surely; certainly; necessarily; fixed; a certain (extent etc); given; particular[cedict]
起
qǐㄑㄧˇ
to rise; to raise; to get up; to initiate (action); classifier for cases or unpredictable events[cedict]
作用
zuò yòngㄗㄨㄛˋ ㄩㄥˋ
to act on; to affect; action; function; activity; impact; result; effect; purpose; intent; to play a role; corresponds to English -ity, -ism, -ization[cedict]