"koapin au" meaning in Mokilese

{
  "etymology_text": "koapin (“back of”) + au (“mouth”)",
  "forms": [
    {
      "form": "koapin oawoan",
      "tags": [
        "construct"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mkj",
        "2": "noun",
        "3": "construct",
        "4": "koapin oawoan"
      },
      "expansion": "koapin au (construct koapin oawoan)",
      "name": "head"
    }
  ],
  "lang": "Mokilese",
  "lang_code": "mkj",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Mokilese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "mkj",
          "name": "Face",
          "orig": "mkj:Face",
          "parents": [
            "Head and neck",
            "Body parts",
            "Body",
            "Anatomy",
            "All topics",
            "Biology",
            "Medicine",
            "Fundamental",
            "Sciences",
            "Healthcare",
            "Health"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "chin"
      ],
      "id": "en-koapin_au-mkj-noun-S-63LeWL",
      "links": [
        [
          "chin",
          "chin"
        ]
      ]
    }
  ],
  "word": "koapin au"
}

{
  "etymology_text": "koapin (“back of”) + au (“mouth”)",
  "forms": [
    {
      "form": "koapin oawoan",
      "tags": [
        "construct"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mkj",
        "2": "noun",
        "3": "construct",
        "4": "koapin oawoan"
      },
      "expansion": "koapin au (construct koapin oawoan)",
      "name": "head"
    }
  ],
  "lang": "Mokilese",
  "lang_code": "mkj",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Mokilese entries with incorrect language header",
        "Mokilese lemmas",
        "Mokilese multiword terms",
        "Mokilese nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "mkj:Face"
      ],
      "glosses": [
        "chin"
      ],
      "links": [
        [
          "chin",
          "chin"
        ]
      ]
    }
  ],
  "word": "koapin au"
}