Of a person's fate, destiny, etc.: inevitable, preordained; unavoidably allotted to a person. †for due: as inevitable (obsolete). Now rare (chiefly ar…

Depending on or produced by compulsion; compelled, forced, enforced, obligatory. In special collocations, as compulsory education, compulsory games.

Caused by compulsion; compelled, forced, enforced; = compulsory, adj. 1. Obsolete.

(un-, prefix1 affix 1.)

colloquial (originally U.S.). That is compelling in some respect; essential, mandatory.