one, single, a (article), as soon as, entire; whole; all; throughout, "one" radical in Chinese characters (Kangxi radical 1), also pr. [yao1] for greater clarity when spelling out numbers digit by digit
next in sequence, second, the second (day, time etc), secondary, vice-, sub-, infra-, inferior quality, substandard, order, sequence, hypo- (chemistry), classifier for enumerated events: time