back and forth; with a reciprocating motion.

To go back and forth; to alternate.

(dated) Pertaining to something or someone moving forward and back to the same position.

(dated) The movement (of someone or something) forward followed by a return to the same position. May refer to a concept such as an emotional state or a relationship as well as a physical thing.

Because of, on account of.

Very close together

(idiomatic) In strict accordance with the rules, especially of card games; in the proper or expected manner.

(management, accounting) The period from the beginning of a fiscal year to the end of a reporting period.

(idiomatic) To take something seriously; to internalize or live according to something (e.g. advice.) / (idiomatic) To feel keenly; be greatly grieved at; be much affected by something.

(idiomatic) To further a loss with mockery or indignity; to worsen an already unfavourable situation.