'flower-hating' originates from Modern English, specifically a compound of 'flower' and the present participle form of the verb 'hate' (from 'hate' + '-ing').

'flower' comes from Old French 'flor' and Latin 'flōs, flōris'; 'hate' comes from Old English 'hātian' (to hate). The compound 'flower-hating' is a straightforward Modern English formation combining the noun and a participial adjective.

Initially this compound simply expressed the action or disposition 'hating flowers'; over time it is used descriptively as an adjective or nominal phrase to label people or attitudes opposed to flowers.