Able to be looked at or worth looking at; suitable for viewing with the eye.
Modern formation from 'eye' (Old English 'ēage') plus the suffix '-able' (from Latin 'habilis' meaning 'able'). This is a relatively recent coinage following standard English word-building patterns.
This word perfectly demonstrates how English speakers constantly create new adjectives with '-able'—we can add it to almost any verb. You'd recognize it immediately even if you'd never seen it before.
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