素樸[soboku] simplicity
敦樸[tonboku] honest and homely
質樸[shitsuboku] simplicity

樸直[bokuchoku] simple and honest
樸樹[mukunoki] Aphananthe oriental elm (Aphananthe aspera)

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