Antonyms of adj unreserved

2 senses of unreserved

Sense 1
unreserved (vs. reserved) -- (not reserved)

reserved (vs. unreserved) -- (set aside for the use of a particular person or party)
        => booked, engaged, set-aside (predicate) -- (reserved in advance)
        => bookable -- (subject to being reserved or booked; "all seats bookable in advance")

Sense 2
unreserved (vs. reserved) -- (not cautious or reticent; "unreserved behavior")

reserved (vs. unreserved) -- (marked by self-restraint and reticence; "was habitually reserved in speech, withholding her opinion"-Victoria Sackville-West)
        => aloof, distant, upstage -- (remote in manner; "stood apart with aloof dignity"; "a distant smile"; "he was upstage with strangers")
        => diffident -- (showing modest reserve; "she was diffident when offering a comment on the professor's lecture")
        => indrawn, withdrawn -- (tending to reserve or introspection; "a quiet indrawn man")

Similarity of adj unreserved

2 senses of unreserved

Sense 1
unreserved (vs. reserved) -- (not reserved)
       => first-come-first-serve (predicate), rush -- (not accepting reservations)
       => unbooked -- (not reserved in advance)

Sense 2
unreserved (vs. reserved) -- (not cautious or reticent; "unreserved behavior")
          Also See-> demonstrative#1; uninhibited#1; unrestrained#1