加特力[katorikku] Catholic (church)
キー入力[kiinyuuryoku] key (input)
苦力[kuurii] coolie
握力[akuryoku] grip (of hand)
圧力[atsuryoku] stress

圧力計[atsuryokukei] manometer
圧力団体[atsuryokudantai] pressure group
圧力調整器[atsuryokuchouseiki] pressure regulator
圧力鍋[atsuryokunabe] pressure cooker
圧力波[atsuryokuha] pressure wave

努める[tsutomeru] to endeavor (endeavour)
努めて[tsutomete] as much as possible
努力[doryoku] great effort
努力家[doryokuka] hard worker
努む[rikimu] to strain

極力努める[kyokuryokutsutomeru] to do one's best
努力も空しく[doryokumomunashiku] after efforts in vain
努力賞[doryokushou] prize awarded for a person's effort
実らなかった努力[minoranakattadoryoku] fruitless (resultless) efforts
奮励努力[funreidoryoku] making strenuous efforts

一張一弛[icchouisshi] tension and relaxation
弛む[yurumu] to become loose
弛み[tarumi] slack
弛む[tarumu] to slacken
中弛み[nakadarumi] a slump

弛緩[shikan] relaxation (e.g. of muscles)
弛張振動[shichoushindou] relaxation oscillation
筋弛緩剤[kinshikanzai] muscle-relaxant drug
弛まない[tayumanai] untiring
腕弛るい[kattarui] listless