'height-related' originates from Modern English, formed by combining the noun 'height' and the adjective 'related' to mean 'related to height'.

'related' comes from Latin 'relatus' (past participle of 'referre') via Old French and Middle English 'relaten'; 'height' comes from Old English 'hēah' (meaning 'high') with a noun-forming suffix (Old English 'hēahþu' > Middle English 'height').

Initially, the components referred separately to 'height' and to being 'related'; combined in modern usage they specifically mean 'pertaining to height' without major semantic shift.