'antishipping' originates from Modern English, combining the prefix 'anti-' (from Greek 'anti-' meaning 'against') and 'shipping' (the -ing form of the slang verb 'to ship', itself clipped from 'relationship' used in fandom).

'anti-' comes from Greek 'anti-' meaning 'against'; the modern slang verb 'to ship' developed in English in late 20th century as a clipping of 'relationship' (used to mean supporting a romantic pairing), and 'antishipping' formed more recently in online fandoms by attaching 'anti-' to 'shipping'.

Initially, 'anti-' simply meant 'against' and 'ship' was unrelated; over time the clipped slang 'ship' came to mean supporting romantic pairings, and 'antishipping' evolved to mean opposition to that fan practice.