happy

A happy event, thing, person, etc.

Preceded by the: happy people as a group.

Often followed by up: to become happy; to brighten up, to cheer up.

Often followed by up: to make happy; to brighten, to cheer, to enliven.

Having a feeling arising from a consciousness of well-being or of enjoyment; enjoying good of any kind, such as comfort, peace, or tranquillity; blissful, contented, joyous.

Music makes me feel happy.

Experiencing the effect of favourable fortune; favored by fortune or luck; fortunate, lucky, propitious.

Content, satisfied (with or to do something); having no objection (to something).

Are you happy to pay me back by the end of the week?

(Of acts, speech, etc.) Appropriate, apt, felicitous.

a happy coincidence

(in combination) Favoring or inclined to use.

slaphappy, trigger-happy

(of people, often followed by "at" or "in") Dexterous, ready, skilful.