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

ユーモアの感覚[yuumoanokankaku] sense of humor
ロボットの視覚[robottonoshikaku] robot vision
圧覚[akkaku] sense of pressure
覚え[oboe] memory
覚える[oboeru] to memorize

覚ます[samasu] to awaken
覚める[sameru] to wake
覚悟[kakugo] resolution
覚者[kakusha] enlightened person
感覚[kankaku] sense