extent/expense,expend,expensive/expend,expansion/extend,extension,extensive/expose,exposure
prospect,prospective/proportion/proceed/propose,proposal
sustain,sustainable/substitute/suspicion,suspect,suspicion
prefer,preference,preferable/present,presentation
acquire/acquaint/inquire/require/request
adopt,adoption/adjust,adjustment,adjustable/adaptation,adaptability
discipline/principle/principal
relate/release/relieve,relief
intensive/intense/intention,intend,intentional
come::comeupwith,comearound,comeacross,comeabout(发生)
call::callfor,callin(邀请,请),callon(拜访;号召),calloff(取消)
put:putoff,putout,putupwith,putaway
set:setout/setoff,setaboutdoingsth,setaside(留出时间等),setback(使倒退,阻碍),setdown(记录下来)
pull::pullthrough(挨过,度过难关或疾病),pullover,pullback(撤退),
turn::turnup,turnover,turnouttobe,turndown
bring:bringforth(推进,推动),bringabout,bringdown,
take::takeon,takeup,takein,takeeffect,takeover