"usiku" meaning in Swahili

{
  "etymology_templates": [
    {
      "args": {
        "1": "sw",
        "2": "bnt-pro"
      },
      "expansion": "Proto-Bantu [Term?]",
      "name": "der"
    }
  ],
  "etymology_text": "From Proto-Bantu [Term?].",
  "forms": [
    {
      "form": "usiku class XI",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "u",
        "2": "-"
      },
      "expansion": "usiku class XI (no plural)",
      "name": "sw-noun"
    }
  ],
  "lang": "Swahili",
  "lang_code": "sw",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Swahili entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "sw",
          "name": "Times of day",
          "orig": "sw:Times of day",
          "parents": [
            "Periodic occurrences",
            "Timekeeping",
            "Time",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "english": "day, daytime",
          "word": "mchana"
        }
      ],
      "derived": [
        {
          "word": "usiku kucha"
        },
        {
          "english": "good night",
          "word": "usiku mwema"
        },
        {
          "english": "tonight",
          "word": "usiku wa leo"
        }
      ],
      "glosses": [
        "night, nighttime (period between sunset and sunrise)"
      ],
      "id": "en-usiku-sw-noun-F9618yRS",
      "links": [
        [
          "night",
          "night"
        ],
        [
          "nighttime",
          "nighttime"
        ]
      ],
      "related": [
        {
          "english": "day, nycthemeron",
          "word": "siku"
        }
      ],
      "tags": [
        "no-plural"
      ],
      "wikipedia": [
        "sw:usiku"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "Sw-ke-usiku.flac",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/8/80/Sw-ke-usiku.flac/Sw-ke-usiku.flac.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/8/80/Sw-ke-usiku.flac/Sw-ke-usiku.flac.ogg"
    }
  ],
  "word": "usiku"
}

{
  "coordinate_terms": [
    {
      "english": "day, daytime",
      "word": "mchana"
    }
  ],
  "derived": [
    {
      "word": "usiku kucha"
    },
    {
      "english": "good night",
      "word": "usiku mwema"
    },
    {
      "english": "tonight",
      "word": "usiku wa leo"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "sw",
        "2": "bnt-pro"
      },
      "expansion": "Proto-Bantu [Term?]",
      "name": "der"
    }
  ],
  "etymology_text": "From Proto-Bantu [Term?].",
  "forms": [
    {
      "form": "usiku class XI",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "u",
        "2": "-"
      },
      "expansion": "usiku class XI (no plural)",
      "name": "sw-noun"
    }
  ],
  "lang": "Swahili",
  "lang_code": "sw",
  "pos": "noun",
  "related": [
    {
      "english": "day, nycthemeron",
      "word": "siku"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 2 entries",
        "Pages with entries",
        "Proto-Bantu term requests",
        "Swahili class XI nouns",
        "Swahili entries with incorrect language header",
        "Swahili lemmas",
        "Swahili nouns",
        "Swahili terms derived from Proto-Bantu",
        "Swahili uncountable nouns",
        "sw:Times of day"
      ],
      "glosses": [
        "night, nighttime (period between sunset and sunrise)"
      ],
      "links": [
        [
          "night",
          "night"
        ],
        [
          "nighttime",
          "nighttime"
        ]
      ],
      "tags": [
        "no-plural"
      ],
      "wikipedia": [
        "sw:usiku"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "Sw-ke-usiku.flac",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/8/80/Sw-ke-usiku.flac/Sw-ke-usiku.flac.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/8/80/Sw-ke-usiku.flac/Sw-ke-usiku.flac.ogg"
    }
  ],
  "word": "usiku"
}