shunless
That cannot be shunned; not to be avoided; inevitable, unavoidable.
literary
Th' immortal Parcæ, fatal sisters three, / Of mortal men, do sing the shunless fate: / What once Was, what Is now, and what Shall Be, / Their life, their death, their fortune, and their state.
Where it comes from
From shun + -less (suffix meaning ‘lacking, without’), probably popularized by the English playwright William Shakespeare (1564–1616) by its use in his play Coriolanus (c. 1608–1609): see the quotation.
Adapted from the Wiktionary entry shunless (CC BY-SA 4.0).