earliest
adjectiveUK /ˈɜː.li.ɪst/
US /ˈɝː.li.ɪst/
The earliest thing happens before all the others.
The earliest bus leaves at six in the morning.
OTHER MEANINGS
2. Happening closest to the start of something.
Her earliest memory is of a trip to the beach.
3. The superlative form of early, meaning most early.
Of all the students, he arrived earliest.
4. The soonest possible time.
Please tell me the earliest you can come.