indissoluble Synonyms

insoluble incapable of dissolving permanent perennial perdurable lifelong lasting irresolvable irresoluble insolvable inseverable inseparable insecable inherent perpetual ravelled sempiternal unsoluble undividable unsolvable ineliminable undecomposable unbreakable never-ending unending undying undestroyable standing solid severable infusible infrangible immortal fixed firm FAST everlasting eternal enduring endless durable deathless continuing constant binding immutable impartible imperishable inextricable inextinguishable