Smitten

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Old English smītan ‘to smear, blemish’, of Germanic origin; related to Dutch smijten and German schmeissen ‘to fling’.

wiktionary

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From Middle English smiten, from Old English smiten, ġesmiten, from Proto-Germanic *smitanaz, past participle of Proto-Germanic *smītaną(“to hurl; fling”), equivalent to smite +‎ -en(past participle ending).

etymonline

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smitten (adj.)

mid-13c., "struck hard, afflicted, visited with disaster," past-participle adjective from smite. Sense of "inspired with love" is from 1660s.