The practice of complying with a law, custom, command or rule. / The custom of celebrating a holiday or similar occasion. / Observation or the act of watching.

(literary) Darkness; the absence of light. / The state of being unknown; a thing that is unknown. / The quality of being difficult to understand; a thing that is difficult to understand.

Causing obstructions.

One who obstructs something.

(passive, constructed with "with") To be preoccupied with a single topic or emotion. / (transitive) To dominate the thoughts of someone.

Alert and paying close attention; watchful. / Diligently attentive in observing a law, custom, duty or principle; regardful; mindful.

The state, or an act, of stubbornness or doggedness.

(medicine) A physician who specializes in childbirth.

(countable) Something that is obscene. / (countable) An act of obscene behaviour. / (countable) Specifically, an offensive word; a profanity; a dirty word.

(medicine) The care of women during and after pregnancy.