筝柱[kotoji] bridge of a koto
筝曲[soukyoku] koto music
古筝[kosou] Guzheng (type of ancient Chinese zither)

俗筝[zokusou] modern koto (in contrast to the gagaku koto or gakuso)
楽筝[gakusou] ancient type of koto with 13 strings used in Gagaku music

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