unable to be avoided, evaded, or escaped; certain; necessary

an inevitable conclusion.

sure to occur, happen, or come; unalterable

The inevitable end of human life is death.

that which is unavoidable.

adjective

avoidable , doubtful , escapable , fortuitous , preventable , uncertain , unlikely , unsure

adjective

all locked up , assured , binding , compulsory , decided , decreed , destined , determined , doomed , fated , fateful , fixed , for certain , foreordained , imminent , impending , ineluctable , ineludible , inescapable , inexorable , inflexible , in the bag * , irresistible , irrevocable , necessary , no ifs ands or buts , obligatory , ordained , pat * , prescribed , settled , sure , unalterable , unavoidable , undeniable , unpreventable , without recourse , certain , fatal , in the cards