intransitive. To become little or more little, be diminished; to dwindle, wane.

To become faint, grow weak or feeble, decline. Const. in, of. Obsolete exc. poetic.

To grow or become weak or weaker.

Of an abstract thing (in later use influenced by sense 5a). intransitive. Of courage, †hope, †faith, etc.: to fail, give way, become faint or…

intransitive. To diminish, abate; to fail, come to nothing. Obsolete.

To waver, lose steadfastness; to flinch, hesitate in action from lack of courage or resolution. Also of courage, hopes, resolve: To give way, flag.