"ey-" meaning in Tooro

{
  "head_templates": [
    {
      "args": {
        "1": "ttj",
        "2": "prefix",
        "cat2": "subject concords"
      },
      "expansion": "ey-",
      "name": "head"
    }
  ],
  "lang": "Tooro",
  "lang_code": "ttj",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Tooro entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Tooro subject concords",
          "parents": [
            "Subject concords",
            "Concords",
            "Prefixes",
            "Morphemes",
            "Lemmas"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "ey- + oma (“to get dry”) → eyoma (“they (class 4) get dry, it (class 9) gets dry”)",
          "type": "example"
        }
      ],
      "glosses": [
        "Form used before a verb beginning with a vowel (that is not -a- or subjunctive -e-) of e-"
      ],
      "id": "en-ey--ttj-prefix-pj-jRMpj",
      "links": [
        [
          "-a-",
          "-a-#Tooro"
        ],
        [
          "-e-",
          "-e-#Tooro"
        ],
        [
          "e-",
          "e-#Tooro"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "ey-"
}

{
  "head_templates": [
    {
      "args": {
        "1": "ttj",
        "2": "prefix",
        "cat2": "subject concords"
      },
      "expansion": "ey-",
      "name": "head"
    }
  ],
  "lang": "Tooro",
  "lang_code": "ttj",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Tooro entries with incorrect language header",
        "Tooro lemmas",
        "Tooro prefixes",
        "Tooro subject concords"
      ],
      "examples": [
        {
          "text": "ey- + oma (“to get dry”) → eyoma (“they (class 4) get dry, it (class 9) gets dry”)",
          "type": "example"
        }
      ],
      "glosses": [
        "Form used before a verb beginning with a vowel (that is not -a- or subjunctive -e-) of e-"
      ],
      "links": [
        [
          "-a-",
          "-a-#Tooro"
        ],
        [
          "-e-",
          "-e-#Tooro"
        ],
        [
          "e-",
          "e-#Tooro"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "ey-"
}