Open English Wordnet
Verbs
(v)settle, settle downsettle into a position, usually on a surface or ground“dust settled on the roofs”
(v)settle, root, take root, steady down, settle downbecome settled or established and stable in one's residence or life style“He finally settled down”
(v)calm, calm down, cool off, chill out, simmer down, settle down, cool itbecome quiet or calm, especially after a state of agitation“After the fight both men need to cool off.”, “It took a while after the baby was born for things to settle down again.”