"κατ' αρχήν" meaning in Greek

{
  "categories": [
    {
      "_dis": "0 0",
      "kind": "other",
      "name": "Greek entries with incorrect language header",
      "parents": [
        "Entries with incorrect language header",
        "Entry maintenance"
      ],
      "source": "w+disamb"
    },
    {
      "_dis": "0 0",
      "kind": "other",
      "name": "Greek undefined derivations",
      "parents": [
        "Undefined derivations",
        "Entry maintenance"
      ],
      "source": "w+disamb"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "el",
        "2": "grc",
        "3": "-"
      },
      "expansion": "Ancient Greek",
      "name": "uder"
    }
  ],
  "etymology_text": "Ancient Greek set phrase.",
  "forms": [
    {
      "form": "κατ’ αρχήν",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kat’ archín",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "prepositional phrase",
        "head": "κατ’ αρχήν"
      },
      "expansion": "κατ’ αρχήν • (kat’ archín)",
      "name": "head"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "prep_phrase",
  "related": [
    {
      "_dis1": "0 0",
      "english": "beginning",
      "roman": "archí",
      "sense": "see",
      "tags": [
        "feminine"
      ],
      "word": "αρχή"
    }
  ],
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "english": "Before we discuss the details we must first agree in principle.",
          "roman": "Prin syzitáme tis leptoméreies prépei próta na symfonísoume kat’ archín.",
          "text": "Πριν συζητάμε τις λεπτομέρειες πρέπει πρώτα να συμφωνήσουμε κατ’ αρχήν.",
          "type": "example"
        }
      ],
      "glosses": [
        "in principle"
      ],
      "id": "en-κατ'_αρχήν-el-prep_phrase-YN6OxLxU",
      "links": [
        [
          "in principle",
          "in principle"
        ]
      ]
    },
    {
      "glosses": [
        "initially, at first"
      ],
      "id": "en-κατ'_αρχήν-el-prep_phrase-YwKhNNuF",
      "links": [
        [
          "initially",
          "initially"
        ],
        [
          "at first",
          "at first"
        ]
      ],
      "qualifier": "misuse",
      "raw_glosses": [
        "(misuse) initially, at first"
      ],
      "synonyms": [
        {
          "word": "κατ' αρχάς"
        }
      ]
    }
  ],
  "synonyms": [
    {
      "_dis1": "0 0",
      "roman": "katarchín",
      "word": "καταρχήν"
    }
  ],
  "word": "κατ' αρχήν"
}

{
  "categories": [
    "Greek entries with incorrect language header",
    "Greek lemmas",
    "Greek multiword terms",
    "Greek prepositional phrases",
    "Greek terms derived from Ancient Greek",
    "Greek undefined derivations"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "el",
        "2": "grc",
        "3": "-"
      },
      "expansion": "Ancient Greek",
      "name": "uder"
    }
  ],
  "etymology_text": "Ancient Greek set phrase.",
  "forms": [
    {
      "form": "κατ’ αρχήν",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kat’ archín",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "prepositional phrase",
        "head": "κατ’ αρχήν"
      },
      "expansion": "κατ’ αρχήν • (kat’ archín)",
      "name": "head"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "prep_phrase",
  "related": [
    {
      "english": "beginning",
      "roman": "archí",
      "sense": "see",
      "tags": [
        "feminine"
      ],
      "word": "αρχή"
    }
  ],
  "senses": [
    {
      "categories": [
        "Greek terms with usage examples"
      ],
      "examples": [
        {
          "english": "Before we discuss the details we must first agree in principle.",
          "roman": "Prin syzitáme tis leptoméreies prépei próta na symfonísoume kat’ archín.",
          "text": "Πριν συζητάμε τις λεπτομέρειες πρέπει πρώτα να συμφωνήσουμε κατ’ αρχήν.",
          "type": "example"
        }
      ],
      "glosses": [
        "in principle"
      ],
      "links": [
        [
          "in principle",
          "in principle"
        ]
      ]
    },
    {
      "glosses": [
        "initially, at first"
      ],
      "links": [
        [
          "initially",
          "initially"
        ],
        [
          "at first",
          "at first"
        ]
      ],
      "qualifier": "misuse",
      "raw_glosses": [
        "(misuse) initially, at first"
      ],
      "synonyms": [
        {
          "word": "κατ' αρχάς"
        }
      ]
    }
  ],
  "synonyms": [
    {
      "roman": "katarchín",
      "word": "καταρχήν"
    }
  ],
  "word": "κατ' αρχήν"
}