Harmless, innocent.

Trustworthy or reliable in character or quality. Now somewhat rare.

Good; of a character or quality to which no exception can be taken. Now archaic and rare.

To whom, or to which, no exception can be taken; perfectly satisfactory or adequate. Of material things. (Rare before 19th cent.)

(un-, prefix1 affix 1b.)

= unobjectionable, adj.

Of an opinion, observation, etc.: characterized by respect; approving, favourable. Now rare.

Not objectionable, inoffensive.

Not open to objection; unexceptional, excellent.