"-tu" meaning in Basque

{
  "etymology_templates": [
    {
      "args": {
        "1": "eu",
        "2": "la",
        "3": "-tus",
        "4": "-tum"
      },
      "expansion": "Latin -tum",
      "name": "bor"
    },
    {
      "args": {
        "1": "en",
        "2": "-ate",
        "id": "verb",
        "pos": "verb-forming suffix"
      },
      "expansion": "English -ate (verb-forming suffix)",
      "name": "cog"
    }
  ],
  "etymology_text": "From Latin -tum, a past participle forming suffix. Basque borrowed Latin verbs in their participle form (for example, aditu (“to hear”) from audītum, neuter perfect passive participle of audiō (“I hear”)), with the ending being reinterpreted as a new verb forming suffix. Compare English -ate (verb-forming suffix).",
  "head_templates": [
    {
      "args": {
        "1": "eu",
        "2": "suffix"
      },
      "expansion": "-tu",
      "name": "head"
    }
  ],
  "lang": "Basque",
  "lang_code": "eu",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "_dis": "59 41",
          "kind": "other",
          "name": "Basque entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "46 54",
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "54 46",
          "kind": "other",
          "name": "Pages with 10 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "54 46",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "euskara (“Basque”) + -tu → euskaratu (“to translate into Basque”)",
          "type": "example"
        },
        {
          "text": "ohera (“to, towards bed”) + -tu → oheratu (“to go to bed”)",
          "type": "example"
        },
        {
          "text": "gehi (“plus”) + -tu → gehitu (“to add”)",
          "type": "example"
        }
      ],
      "glosses": [
        "A verb-forming suffix."
      ],
      "id": "en--tu-eu-suffix-PGrDGJ~r",
      "tags": [
        "morpheme"
      ]
    },
    {
      "categories": [
        {
          "_dis": "46 54",
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "54 46",
          "kind": "other",
          "name": "Pages with 10 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "54 46",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "gehi (“plus”) + -tu → gehitu (“augmented”)",
          "type": "example"
        }
      ],
      "glosses": [
        "Used to form adjectives, roughly corresponding to the English past participle forming suffix -ed."
      ],
      "id": "en--tu-eu-suffix-gUo1enou",
      "links": [
        [
          "adjective",
          "adjective#English"
        ],
        [
          "-ed",
          "-ed#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "synonyms": [
    {
      "_dis1": "0 0",
      "word": "-du"
    }
  ],
  "word": "-tu"
}

{
  "categories": [
    "Basque entries with incorrect language header",
    "Basque lemmas",
    "Basque suffixes",
    "Basque terms borrowed from Latin",
    "Basque terms derived from Latin",
    "Pages using catfix",
    "Pages with 10 entries",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "eu",
        "2": "la",
        "3": "-tus",
        "4": "-tum"
      },
      "expansion": "Latin -tum",
      "name": "bor"
    },
    {
      "args": {
        "1": "en",
        "2": "-ate",
        "id": "verb",
        "pos": "verb-forming suffix"
      },
      "expansion": "English -ate (verb-forming suffix)",
      "name": "cog"
    }
  ],
  "etymology_text": "From Latin -tum, a past participle forming suffix. Basque borrowed Latin verbs in their participle form (for example, aditu (“to hear”) from audītum, neuter perfect passive participle of audiō (“I hear”)), with the ending being reinterpreted as a new verb forming suffix. Compare English -ate (verb-forming suffix).",
  "head_templates": [
    {
      "args": {
        "1": "eu",
        "2": "suffix"
      },
      "expansion": "-tu",
      "name": "head"
    }
  ],
  "lang": "Basque",
  "lang_code": "eu",
  "pos": "suffix",
  "senses": [
    {
      "examples": [
        {
          "text": "euskara (“Basque”) + -tu → euskaratu (“to translate into Basque”)",
          "type": "example"
        },
        {
          "text": "ohera (“to, towards bed”) + -tu → oheratu (“to go to bed”)",
          "type": "example"
        },
        {
          "text": "gehi (“plus”) + -tu → gehitu (“to add”)",
          "type": "example"
        }
      ],
      "glosses": [
        "A verb-forming suffix."
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "examples": [
        {
          "text": "gehi (“plus”) + -tu → gehitu (“augmented”)",
          "type": "example"
        }
      ],
      "glosses": [
        "Used to form adjectives, roughly corresponding to the English past participle forming suffix -ed."
      ],
      "links": [
        [
          "adjective",
          "adjective#English"
        ],
        [
          "-ed",
          "-ed#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "-du"
    }
  ],
  "word": "-tu"
}