cross-eyed

the term 'cross-eyed' is a transparent english compound, formed from the adjective 'cross' and the combining form '-eyed'. the concept of 'cross' to denote something transverse or intersecting was borrowed into old english from old norse, which itself derived it from the latin 'crux', meaning a stake or cross. the '-eyed' element is a native english formation, directly from the old english word for eye. the compound literally describes eyes that are turned or directed across each other's line of sight, converging inward. this straightforward descriptive logic has been used since at least the 18th century to name the medical condition strabismus, specifically esotropia, and later extended informally to describe a squinting or intense gaze.

Structure: cross (to lie across) + eyed (having eyes) cross (from old english 'cros', from old norse 'kross', from latin 'crux, crucis') is a noun/adjective/verb used here in a compound to indicate a transverse or intersecting position. eyed (from old english 'ēage' (eye) + the suffix '-ed', forming adjectives meaning 'having (a specified kind of) eyes') is a combining form indicating possession of eyes with a particular quality.