"καθ'" meaning in Ancient Greek

{
  "forms": [
    {
      "form": "καθ’",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kath’",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "gen",
        "2": "acc",
        "head": "καθ’"
      },
      "expansion": "καθ’ • (kath’) (governs the genitive and accusative)",
      "name": "grc-preposition"
    }
  ],
  "lang": "Ancient Greek",
  "lang_code": "grc",
  "pos": "prep",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(katá) (used before a rough breathing)",
          "word": "κατά"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Ancient Greek accusative prepositions",
          "parents": [
            "Accusative prepositions",
            "Prepositions",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Ancient Greek entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Ancient Greek genitive prepositions",
          "parents": [
            "Genitive prepositions",
            "Prepositions",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Ancient Greek prepositions",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Apocopic form of κατά (katá) (used before a rough breathing)"
      ],
      "id": "en-καθ'-grc-prep-tFyUK188",
      "links": [
        [
          "κατά",
          "κατά#Ancient_Greek"
        ]
      ],
      "tags": [
        "abbreviation",
        "accusative",
        "alt-of",
        "apocopic",
        "with-genitive"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/katʰ/"
    },
    {
      "ipa": "/kaθ/"
    },
    {
      "ipa": "/kaθ/"
    },
    {
      "ipa": "/katʰ/",
      "note": "5ᵗʰ BCE Attic"
    },
    {
      "ipa": "/katʰ/",
      "note": "1ˢᵗ CE Egyptian"
    },
    {
      "ipa": "/kaθ/",
      "note": "4ᵗʰ CE Koine"
    },
    {
      "ipa": "/kaθ/",
      "note": "10ᵗʰ CE Byzantine"
    },
    {
      "ipa": "/kaθ/",
      "note": "15ᵗʰ CE Constantinopolitan"
    }
  ],
  "word": "καθ'"
}

{
  "forms": [
    {
      "form": "καθ’",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kath’",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "gen",
        "2": "acc",
        "head": "καθ’"
      },
      "expansion": "καθ’ • (kath’) (governs the genitive and accusative)",
      "name": "grc-preposition"
    }
  ],
  "lang": "Ancient Greek",
  "lang_code": "grc",
  "pos": "prep",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(katá) (used before a rough breathing)",
          "word": "κατά"
        }
      ],
      "categories": [
        "Ancient Greek 1-syllable words",
        "Ancient Greek accusative prepositions",
        "Ancient Greek apocopic forms",
        "Ancient Greek entries with incorrect language header",
        "Ancient Greek genitive prepositions",
        "Ancient Greek lemmas",
        "Ancient Greek prepositions",
        "Ancient Greek terms with IPA pronunciation",
        "Ancient Greek unaccented terms",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "glosses": [
        "Apocopic form of κατά (katá) (used before a rough breathing)"
      ],
      "links": [
        [
          "κατά",
          "κατά#Ancient_Greek"
        ]
      ],
      "tags": [
        "abbreviation",
        "accusative",
        "alt-of",
        "apocopic",
        "with-genitive"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/katʰ/"
    },
    {
      "ipa": "/kaθ/"
    },
    {
      "ipa": "/kaθ/"
    },
    {
      "ipa": "/katʰ/",
      "note": "5ᵗʰ BCE Attic"
    },
    {
      "ipa": "/katʰ/",
      "note": "1ˢᵗ CE Egyptian"
    },
    {
      "ipa": "/kaθ/",
      "note": "4ᵗʰ CE Koine"
    },
    {
      "ipa": "/kaθ/",
      "note": "10ᵗʰ CE Byzantine"
    },
    {
      "ipa": "/kaθ/",
      "note": "15ᵗʰ CE Constantinopolitan"
    }
  ],
  "word": "καθ'"
}