wholeheartedly; intently; with undivided attention
Describes doing something with complete focus, free from distracting thoughts. Often used with verbs like 取り組む, 打ち込む, or 励む.
See also: 余念無く
He is wholeheartedly absorbed in his research.
The children are playing intently.
Means being so absorbed that one loses awareness of surroundings. 余念もなく focuses on mental focus without stray thoughts.
Standard kanji spelling.
Variant using 無く for なく.
From 余念 (distracting thoughts) + も (even) + なく (without). Literally 'without even stray thoughts'.