Skilled and experienced at something through repeated practice and effort.
From 'practice' (via Old French and Medieval Latin 'practicus'), related to 'praxis' meaning action or application of knowledge. The past participle form became an adjective meaning experienced.
British spelling uses 'practised' (adjective) while Americans use 'practiced'—but interestingly, the verb is 'practise' in British English and 'practice' in American English, one of the trickiest spelling rules in English!
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