lifen /ˈlaɪfən/ verb1 •(no longer used) To liven, to enliven.Rush me in / VVhil'st Mellida prepares her selfe to die: / Halter about thy necke, and vvith such sighs, / Laments, and acclamations lyfen it, / As if impulsiue povver of remorse. — 1600 formslifened · lifening · lifens