adjective
1.
Synonyms: negligent , careless, delinquent, derelict, disregardful, lax, neglectful, regardless, remiss, slack
2.
Synonyms: backward 6, underdeveloped, undeveloped, unprogressive
3.
Synonyms: tardy , belated, late, lated, overdue, unpunctual
Antonyms: beforehand