that can be tolerated

endurable

of, conforming to, the rules of grammar

pertaining to syntax

that can be justified

reasonable, well-founded

(of roads etc) that can be passed over or crossed; that can be accepted as fairly good but not excellent

acceptable, admissible

connected (with the topic, problem, person etc receiving attention)

appropriate; to the purpose

relating to meaning in language

pertaining to syntax

of syntax

pertaining to syntax

fairly good

acceptable, good enough

(of a sin, error, fault) that can be forgiven or excused

pardonable