直向[hitamuki] earnest
安直[anchoku] inexpensive
一直[icchoku] lining out to first base
一直線[icchokusen] straight line
鉛直[enchoku] perpendicular

下駄直し[getanaoshi] repairing clogs
開き直る[hirakinaoru] to become defiant
気を取り直す[kiwotorinaosu] to completely rethink
急転直下[kyuutenchokka] suddenly and precipitately
居直る[inaoru] to sit up properly straight

演奏練習[ensourenshuu] musical rehearsal
教練[kyouren] drill
訓練[kunren] practice
軍事教練[gunjikyouren] military training
軍事訓練[gunjikunren] military exercise

試練[shiren] test
手練手管[terentekuda] wiles
修練者[shuurensha] (Catholic) neophyte
熟練[jukuren] skill
洗練[senren] polish