travailous
Causing or involving travail; laborious; toilsome.
archaic, literary
[…] of my redemption thence, / And portance in travailous history,
Where it comes from
From Middle English travailous (“laborious, wearisome”), from Anglo-Norman travaillous, Old French travaillos (“tiring, painful”). Equivalent to travail + -ous.
Adapted from the Wiktionary entry travailous (CC BY-SA 4.0).