upstairs

ad.往(在)楼上

upper, upper case, upper-cut, uppermost, uppish, upraise, upright, upright piano (also upright), uprightness, uprising, uproar, uproarious, uproariously, uproot, upset, upshot, upside, upside down, upside-down, upstage, upstanding, upstart, upstream, upsurge, upswing, uptake, uptight, uptown, upturn, upturned, upward, upward (also upwards / -wEdz; -wLdz/), upward mobility, upward(s), upwards, upwards of, upwind, uranium, urban, urbane,