1) Copulate 2) Couple 3) Deprive of virginity 4) French word used in English 5) Make imperfect 6) Mate 7) Pair 8) Ruin 9) To deprive of flowers Found on https://www.crosswordclues.com/clue/deflower
De·flow'er transitive verb [ Prefix de- + flower .] Same as Deflour . « An earthquake . . . deflowering the gardens.» W. Montagu. « If a man had deflowered a virgin.» Milton. Found on http://www.encyclo.co.uk/webster/D/24
to deprive (a woman) of virginity. · to despoil of beauty, freshness, sanctity, etc. · to deprive or strip of flowers: The deer had deflowered an entire section of the garden. Found on https://www.infoplease.com/dictionary/deflower