"sub" meaning in Esperanto

{
  "antonyms": [
    {
      "word": "super"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": ":bor",
        "3": "la:sub",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *upó\nProto-Italic *supo\nLatin subbor.\nEsperanto sub",
      "name": "etymon"
    },
    {
      "args": {
        "1": "eo",
        "2": "la",
        "3": "sub"
      },
      "expansion": "Latin sub",
      "name": "bor"
    }
  ],
  "etymology_text": "Etymology tree\nProto-Indo-European *upó\nProto-Italic *supo\nLatin subbor.\nEsperanto sub\nFrom Latin sub.",
  "head_templates": [
    {
      "args": {},
      "expansion": "sub",
      "name": "eo-prep"
    }
  ],
  "hyphenation": [
    "sub"
  ],
  "hyphenations": [
    {
      "parts": [
        "sub"
      ]
    }
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Esperanto BRO1",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto entries with etymology trees",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto prepositions",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages using etymon with no ID",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 13 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with etymology trees",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "under, below"
      ],
      "id": "en-sub-eo-prep-7MbRut0~",
      "links": [
        [
          "under",
          "under"
        ],
        [
          "below",
          "below"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/sub/"
    },
    {
      "rhymes": "-ub"
    }
  ],
  "word": "sub"
}

{
  "antonyms": [
    {
      "word": "super"
    }
  ],
  "categories": [
    "Pages with 13 entries",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": ":bor",
        "3": "la:sub",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *upó\nProto-Italic *supo\nLatin subbor.\nEsperanto sub",
      "name": "etymon"
    },
    {
      "args": {
        "1": "eo",
        "2": "la",
        "3": "sub"
      },
      "expansion": "Latin sub",
      "name": "bor"
    }
  ],
  "etymology_text": "Etymology tree\nProto-Indo-European *upó\nProto-Italic *supo\nLatin subbor.\nEsperanto sub\nFrom Latin sub.",
  "head_templates": [
    {
      "args": {},
      "expansion": "sub",
      "name": "eo-prep"
    }
  ],
  "hyphenation": [
    "sub"
  ],
  "hyphenations": [
    {
      "parts": [
        "sub"
      ]
    }
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        "Esperanto 1-syllable words",
        "Esperanto BRO1",
        "Esperanto entries with etymology trees",
        "Esperanto entries with incorrect language header",
        "Esperanto lemmas",
        "Esperanto prepositions",
        "Esperanto terms borrowed from Latin",
        "Esperanto terms derived from Latin",
        "Esperanto terms derived from Proto-Indo-European",
        "Esperanto terms derived from Proto-Italic",
        "Esperanto terms with IPA pronunciation",
        "Esperanto terms with audio pronunciation",
        "Pages using etymon with no ID",
        "Pages with 13 entries",
        "Pages with entries",
        "Pages with etymology trees",
        "Rhymes:Esperanto/ub",
        "Rhymes:Esperanto/ub/1 syllable"
      ],
      "glosses": [
        "under, below"
      ],
      "links": [
        [
          "under",
          "under"
        ],
        [
          "below",
          "below"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/sub/"
    },
    {
      "rhymes": "-ub"
    }
  ],
  "word": "sub"
}