early

ear-ly

adverb

Before the usual, expected, or appointed time.

"She arrived early for the meeting."

adjective

Happening or done before the usual or expected time.

"We caught an early train to London."

Thesaurus

Synonyms: betimes, azoic, earlier, primaeval, beforehand, archaeozoic, earlyish, archaean, archean, wee, archeozoic, premature

Antonyms: belatedly, late, later(a), middle, tardily