(of a person, animal) to put oneself in a horizontal position

relax

(of supplies, sound etc) to come gradually to an end

decrease

(to cause something) to become less tight, stiff or rigid; (to case a person, part of the body) to become less tense, active etc

be or feel at ease

to make (a person, a person's feelings or emotions) quiet or calm; to make (pains, aches) less sharp or severe

calm, ease

to behave in a way free from strain or formality

be or feel at ease