"-πτω" meaning in Ancient Greek

{
  "etymology_templates": [
    {
      "args": {
        "1": "grc",
        "2": "grk-pro",
        "3": "*-pťō"
      },
      "expansion": "Proto-Hellenic *-pťō",
      "name": "der"
    },
    {
      "args": {
        "1": "grc",
        "2": "ine-pro",
        "3": "-"
      },
      "expansion": "Proto-Indo-European",
      "name": "der"
    }
  ],
  "etymology_text": "From Proto-Hellenic *-pťō, from a stem ending in the consonant *p + the Proto-Indo-European present suffixes *-yeti (transitive imperfective suffix) or *-yéti (intransitive imperfective suffix).",
  "forms": [
    {
      "form": "-ptō",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "-πτω • (-ptō)",
      "name": "grc-verb"
    }
  ],
  "lang": "Ancient Greek",
  "lang_code": "grc",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "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 terms with redundant script codes",
          "parents": [
            "Terms with redundant script codes",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A suffix forming the present stem of some verbs from stems in the consonant π (p)"
      ],
      "id": "en--πτω-grc-suffix-BPlDfikh",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-πτω"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "grc",
        "2": "grk-pro",
        "3": "*-pťō"
      },
      "expansion": "Proto-Hellenic *-pťō",
      "name": "der"
    },
    {
      "args": {
        "1": "grc",
        "2": "ine-pro",
        "3": "-"
      },
      "expansion": "Proto-Indo-European",
      "name": "der"
    }
  ],
  "etymology_text": "From Proto-Hellenic *-pťō, from a stem ending in the consonant *p + the Proto-Indo-European present suffixes *-yeti (transitive imperfective suffix) or *-yéti (intransitive imperfective suffix).",
  "forms": [
    {
      "form": "-ptō",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "-πτω • (-ptō)",
      "name": "grc-verb"
    }
  ],
  "lang": "Ancient Greek",
  "lang_code": "grc",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Ancient Greek entries with incorrect language header",
        "Ancient Greek lemmas",
        "Ancient Greek suffixes",
        "Ancient Greek terms derived from Proto-Hellenic",
        "Ancient Greek terms derived from Proto-Indo-European",
        "Ancient Greek terms with redundant script codes",
        "Ancient Greek unaccented terms",
        "Ancient Greek verb-forming suffixes"
      ],
      "glosses": [
        "A suffix forming the present stem of some verbs from stems in the consonant π (p)"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-πτω"
}