urchin

n 1 (a) (esp dated 尤作旧) mischievous or naughty child, esp a boy 顽童, 淘气鬼（尤指男孩）: You little urchin! 你这个小淘气! (b) (also `street-urchin) ragged or dirty child who is homeless and lives in poverty 街头流浪儿. 2 = sea-urchin (sea).

uptake, uptight, uptown, upturn, upturned, upward, upward (also upwards / -wEdz; -wLdz/), upward mobility, upward(s), upwards, upwards of, upwind, uranium, urban, urbane, urbanely, urbanity, urbanization, urbanisation, urbanize, urbanize, urbanise, Urdu, urea, ureter, urethra, urge, urge sb to do, urge sb. on, urged, urgency, urgent, urgently, uric, urinal, urinary, urinate, urine, urn, us, USA, usable,