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

閾値[ikichi] threshold (amount, dose, etc.)
識閾[shikiiki] threshold of consciousness
閾下[ikika] subliminal (below the threshold of sensation or consciousness)
閾刺激[ikishigeki] threshold stimulus

検知閾値[kenchiikichi] detection threshold
痛覚閾値[tsuukakuikichi] pain threshold
閾値下[ikichika] subliminal