enforced or compulsory

forced labor.

strained, unnatural, or affected

a forced smile.

subjected to force.

required by circumstances; emergency

a forced landing of an airplane.

adjective

noncompulsory , spontaneous , unforced , voluntary , discretional , elective , optional

adjective

affected , artificial , begrudging , binding , bound , coerced , coercive , compelled , conscripted , constrained , contrived , enforced , factitious , false , grudging , inflexible , insincere , involuntary , labored , mandatory , obligatory , peremptory , rigid , slave , stiff , stringent , unnatural , unwilling , wooden *notes:forcible indicates the use of brute force , forced means done involuntarily , and forceful suggests a potential for force , compulsory , effortful , strained , far-fetched , farfetched , reluctant , stilted