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

辿たどしい[tadotadoshii] with difficulty
辿りつく[tadoritsuku] to struggle on to

辿る[tadoru] to follow (road)
元を辿る[motowotadoru] to trace back to (the origins of something)