ardua

== Italian == === Adjective === ardua feminine singular of arduo == Latin == === Noun === ardua nominative/accusative/vocative plural of arduum === Adjective === ardua inflection of arduus: nominative/vocative feminine singular nominative/accusative/vocative neuter plural === Adjective === arduā ablative feminine singular of arduus == Spanish == === Adjective === ardua f feminine singular of arduo