金無垢[kinmuku] pure gold
歯垢[shikou] (dental) plaque
耳垢[mimiaka] earwax
手垢[teaka] finger marks
無垢[muku] purity

頭垢[fuke] dandruff
垢抜ける[akanukeru] to refine
純真無垢[junshinmuku] pure
寒垢離[kangori] cold-water ablutions performed in winter

一念発起[ichinenhokki] being resolved to (do something)
引き起す[hikiokosu] to cause
縁起[engi] omen
喚起[kanki] arousal
起きる[okiru] to get up

起上る[okiagaru] to rise
起す[okosu] to raise
起こり得る[okoriuru] to be possible to occur
起る[okoru] to occur
起つ[tatsu] to rise up