umbrella = ombrel-o.
uncle = onkl-o.
unanimous = unuvocx-a, unuanim-a.
uncommon = kurioz-a, nekomun-a.
unconcerned = indiferent-a; nezorgem-a.
under = (prep.), sub (121, 160).
underline = substrek-i.
understand = kompren-i.
undertake = entrepren-i; -- initiative work, klopod-i.
undeviating = rekt-a.
unfailing = (adv.), nepr-e, cert-e.
unimportant = indiferent-a, negrav-a.
union = unuig-o, unuigx-o, kunig-o, kunigx-o.
universe = univers-o.
university = universitat-o.
until = (prep.), gxis (89)
up = (adv.), supre, supren (121); -- to, gxis (46).
upholster = rembur-i.
upper = supr-a.
upon = (prep.), sur (160).
upright = just-a; (vertical), vertikal-a.
urge = urgx-i, insiste pet-i.
upset = (trans.), renvers-i.
utmost = ekstrem-a, ebl-o (161, see also 162).