skilful
Pronunciation: /ˈskɪlfʊl, -f(ə)l/
(also chiefly North American skillful)

Spelling help
Remember that skilful is spelled with one l in the middle (the spelling skillful is American).

Spelling rule
If a word ends in a double l, drop the last l when adding endings which begin with a consonant (here, skill plus -ful): skilful.