"ku-" meaning in Tocharian B

{
  "etymology_templates": [
    {
      "args": {
        "1": "txb",
        "2": "ine-pro",
        "3": "*ǵʰew-"
      },
      "expansion": "",
      "name": "root"
    },
    {
      "args": {
        "1": "txb",
        "2": "ine-pro",
        "3": "*ǵʰew-"
      },
      "expansion": "Proto-Indo-European *ǵʰew-",
      "name": "inh"
    },
    {
      "args": {
        "1": "grc",
        "2": "χέω"
      },
      "expansion": "Ancient Greek χέω (khéō)",
      "name": "cog"
    },
    {
      "args": {
        "1": "sa",
        "2": "जुहोति"
      },
      "expansion": "Sanskrit जुहोति (juhoti)",
      "name": "cog"
    },
    {
      "args": {
        "1": "xcl",
        "2": "ձեւ"
      },
      "expansion": "Old Armenian ձեւ (jew)",
      "name": "cog"
    },
    {
      "args": {
        "1": "la",
        "2": "fundō"
      },
      "expansion": "Latin fundō",
      "name": "cog"
    },
    {
      "args": {
        "1": "la",
        "2": "fūtis"
      },
      "expansion": "fūtis",
      "name": "m"
    },
    {
      "args": {
        "1": "ang",
        "2": "ġēotan"
      },
      "expansion": "Old English ġēotan",
      "name": "cog"
    },
    {
      "args": {
        "1": "ang",
        "2": "guttas"
      },
      "expansion": "guttas",
      "name": "m"
    },
    {
      "args": {
        "1": "en",
        "2": "gut"
      },
      "expansion": "English gut",
      "name": "cog"
    }
  ],
  "etymology_text": "From Proto-Indo-European *ǵʰew-. Cognates include Ancient Greek χέω (khéō), Sanskrit जुहोति (juhoti), Old Armenian ձեւ (jew), Latin fundō, fūtis and Old English ġēotan, guttas (English gut).",
  "head_templates": [
    {
      "args": {
        "1": "txb",
        "2": "verb"
      },
      "expansion": "ku-",
      "name": "head"
    }
  ],
  "lang": "Tocharian B",
  "lang_code": "txb",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "_dis": "61 39",
          "kind": "other",
          "name": "Tocharian B entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "to pour"
      ],
      "id": "en-ku--txb-verb-aD9RLbad",
      "links": [
        [
          "pour",
          "pour"
        ]
      ]
    },
    {
      "glosses": [
        "to offer a libation"
      ],
      "id": "en-ku--txb-verb-LZnrJwnq",
      "links": [
        [
          "offer",
          "offer"
        ],
        [
          "libation",
          "libation"
        ]
      ]
    }
  ],
  "word": "ku-"
}

{
  "categories": [
    "Tocharian B entries with incorrect language header",
    "Tocharian B lemmas",
    "Tocharian B terms derived from Proto-Indo-European",
    "Tocharian B terms derived from the Proto-Indo-European root *ǵʰew-",
    "Tocharian B terms inherited from Proto-Indo-European",
    "Tocharian B verbs"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "txb",
        "2": "ine-pro",
        "3": "*ǵʰew-"
      },
      "expansion": "",
      "name": "root"
    },
    {
      "args": {
        "1": "txb",
        "2": "ine-pro",
        "3": "*ǵʰew-"
      },
      "expansion": "Proto-Indo-European *ǵʰew-",
      "name": "inh"
    },
    {
      "args": {
        "1": "grc",
        "2": "χέω"
      },
      "expansion": "Ancient Greek χέω (khéō)",
      "name": "cog"
    },
    {
      "args": {
        "1": "sa",
        "2": "जुहोति"
      },
      "expansion": "Sanskrit जुहोति (juhoti)",
      "name": "cog"
    },
    {
      "args": {
        "1": "xcl",
        "2": "ձեւ"
      },
      "expansion": "Old Armenian ձեւ (jew)",
      "name": "cog"
    },
    {
      "args": {
        "1": "la",
        "2": "fundō"
      },
      "expansion": "Latin fundō",
      "name": "cog"
    },
    {
      "args": {
        "1": "la",
        "2": "fūtis"
      },
      "expansion": "fūtis",
      "name": "m"
    },
    {
      "args": {
        "1": "ang",
        "2": "ġēotan"
      },
      "expansion": "Old English ġēotan",
      "name": "cog"
    },
    {
      "args": {
        "1": "ang",
        "2": "guttas"
      },
      "expansion": "guttas",
      "name": "m"
    },
    {
      "args": {
        "1": "en",
        "2": "gut"
      },
      "expansion": "English gut",
      "name": "cog"
    }
  ],
  "etymology_text": "From Proto-Indo-European *ǵʰew-. Cognates include Ancient Greek χέω (khéō), Sanskrit जुहोति (juhoti), Old Armenian ձեւ (jew), Latin fundō, fūtis and Old English ġēotan, guttas (English gut).",
  "head_templates": [
    {
      "args": {
        "1": "txb",
        "2": "verb"
      },
      "expansion": "ku-",
      "name": "head"
    }
  ],
  "lang": "Tocharian B",
  "lang_code": "txb",
  "pos": "verb",
  "senses": [
    {
      "glosses": [
        "to pour"
      ],
      "links": [
        [
          "pour",
          "pour"
        ]
      ]
    },
    {
      "glosses": [
        "to offer a libation"
      ],
      "links": [
        [
          "offer",
          "offer"
        ],
        [
          "libation",
          "libation"
        ]
      ]
    }
  ],
  "word": "ku-"
}