Fain expresses eagerness, readiness, or heartfelt willingness, usually in a compact and slightly old-fashioned form. A speaker may fain follow a beloved, fain remain beside a fire, or fain believe in a consoling vision. The term appears often in traditional lyric and narrative poetry because it fits easily into meter and carries emotional directness. Depending on context, fain can sound warmly eager or wistfully constrained by circumstances that prevent the desired action.

Fain means willingly, gladly, or eagerly and most often appears in constructions such as “I would fain go” or “had fain remained.” It has an archaic, literary register that can evoke earlier poetry, restraint, or formal longing. Compare gladly, which is plainer, and would rather, which may better suit modern speech. Because modern readers may not know it, place enough contextual pressure around the word to clarify desire without interrupting the poem’s music.