pains, efforts, hard work

make strenuous efforts, be at pains to, struggle to

comb

櫛: comb / 串: skewer; proxy server / 駆使: good command of, full use of

駆使: have excellent command of

a skewer, spit / (Shinto) Short for 玉串 (tamagushi): a branch of a 榊 (sakaki) tree used as a Shinto offering / Short for 幕串 (makugushi): a post used to hang a curtain / a candle's wick

a surname

(slang, computing) a proxy server

good command of, full use of

to make excellent use of, to have a good command of