'anti-gravity-related' is a Modern English compound formed from the combining prefix 'anti-' (from Greek 'anti' meaning 'against'), the noun 'gravity' (from Latin 'gravitas' meaning 'weight, heaviness'), and the adjective 'related' (from Latin 'relatus', past participle of 'referre', meaning 'to carry back' or 'bring back').

'gravity' comes from Latin 'gravitas' → Old French 'gravite' → Middle English 'gravitie' → modern English 'gravity'. 'anti-' is derived from Greek 'anti' and has been used as a productive prefix in English since the modern period to mean 'against' or 'opposed to'. 'related' comes via Latin 'relatus' (past participle of 'referre') through Old French/Latinized forms into Middle English 'relaten' and then modern English 'related'.

The components originally referred to 'against' ('anti-') and 'weight/heaviness' ('gravity'); combined in modern usage the compound means 'pertaining to things that act against or negate gravity' rather than literal opposition to physical weight alone.