spiral staircase

登る, 上る: to ascend, to climb, to go up / 昇る, 上る: to go up, rise

reach; hit; get to; amount to

a helix, a spiral / a screw

stairs, staircase / ladder, a series of steps to advancement to be followed in order

(formal) Female third-person singular pronoun; she, her, girlfriend

(colloquial) a girlfriend (a female partner in a romantic relationship)

(literary) they (about women or girls)

to go; to come to one's place / to (a letter) be delivered / to depart / to rely (on a method) / (年が～) to age / (うまく～) to go well / イく: (slang) to have an orgasm, to come, to cum

past tense and perfective aspect of 行く (iku) [godan]