一触即発[isshokusokuhatsu] critical (touch and go) situation
即く[tsuku] to ascend (the throne)
即ける[tsukeru] to install (a king, emperor, etc.)
色即是空[shikisokuzekuu] form is emptiness
即する[sokusuru] to conform to

即ち[sunawachi] that is
即位[sokui] enthronement
即応[sokuou] compliance
即興[sokkyou] improvisation
即興曲[sokkyoukyoku] impromptu (musical)

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