To breathe; to inhale. Also: to rest and recover one's normal rate of breathing after vigorous physical activity. Now somewhat rare.

In reference to a single thing. With union or combination of parts or elements; into or in a condition of unity; so as to form a connected whole.

To sharpen, render (more) acute, keen, or eager (a person's wits, appetite, interest, curiosity, etc.). Also with up.

transitive. Usually of a thing: to strengthen or invigorate physically; to refresh. Also intransitive. Now rare.

intransitive. To recover vigour; to revive.

intransitive. To rest and recover after vigorous physical activity; to take a breather. Also figurative: to pause in order to reflect, relax, or…

intransitive. Now rare. To have relief from some unpleasant or undesirable situation; to recover hope, courage, or strength.

To grow strong, recover strength.

transitive (and reflexive). To restore from weariness; to refresh or rest.

intransitive. To go for a walk outdoors for the purpose of taking air or exercise. Now only in African-American usage with out.

intransitive. To return to strength, health, etc.; to recuperate, recover. Also with up.

intransitive. To restore one's strength or energy, esp. by resting; to take refreshment in some way, esp. (in later use) in the form of an alcoholic…

intransitive. To return to life; to revive; to regain vigour or spirit.

transitive. To impart vigour to; to render vigorous; to fill with life and energy; to strengthen, animate.

intransitive. To revive, recover; to pull oneself together; to acquire or assume fresh vigour or energy.

to perk up. intransitive. To recover from depression or sickness; to recover confidence, health, liveliness, etc.; to become lively. Now colloquial.

intransitive. To revive, recover. Obsolete.

intransitive. = reawaken, v. 2.

intransitive. To assume a fresh or new look; to become bright or vivid, to brighten. Also: to increase in freshness or newness. Now rare.

intransitive. Of a person's strength: to return.

intransitive. To recover from illness or exertion. Also occasionally: to recover from a financial loss.

transitive. To restore strength to (one's body, mind, energy, enthusiasm, etc.); also reflexive. to recharge one's (also the) batteries: to…