Happening at an opportune or advantageous time. / Keeping accurate time.

Properly constructed or manufactured.

friendly and sympathetic

Having good intentions, even if resulting in unfortunate consequences.

Having good intentions, even if producing unfortunate results.

(of an older person) healthy and ageing gracefully / (of an old, possibly ancient, object) in good condition considering its age.

Having a precise arrangement. / (mathematics, not comparable) Having a well-order.

simple past tense and past participle of well-order

Of a person: having extensive knowledge of a subject. / Of an argument, etc.: based on good judgment and solid reasoning.

(of a person) neat and well-dressed / neat and tidy