To waste (away) through grief, pain, longing, etc.
Decline is defined as to refuse something, slope downward, become less or to sink from view.
To fall into ruin:
(Nautical) To change the direction of the sail so as to point in a direction that is more down wind; to bring the bow leeward.
To drop off is to take something or someone to a specific destination and leave it there, not usually lingering or staying around.
(Intransitive) To become less or fewer.
Find another word for fall-away. In this page you can discover 9 synonyms, antonyms, idiomatic expressions, and related words for fall-away, like: pine, waste-away, decline, decay, decrease, fall off, slip, drop-off and drop-away.