(a secured, firm joint or association) to become slack.

to become infirm, weak, feeble.

(control, discipline) to be lost or slack.

to become less haughty.

(haughtiness, arrogance) to be mellowed down.

(strength, energy, power, intensity) etc. to grow less or lost.

to mix or mingle with others and share one's pains and pleasures with others freely; to become more sociable.