constrained

US /kənˈstreɪnd/
UK /kənˈstreɪnd/
1.

appearing forced or overly controlled.

:
•
he was acting in a constrained manner
:
unnaturalawkwardself-consciousmanneredartificialwoodenstiltedstrainedforcedcontrivedlaboredinhibitedrepresseduneasyembarrassedtongue-tiedrestrainedreservedreticentguardeddistantaloofcoldcoolstandoffish
:
relaxed
:
constrain