Dreye權威釋義|croon

vi.

vt.

n.

同義:

vi.低唱

以上來源於：《英漢大辭典》

v.

hum, sing, or speak in a soft, low voice.

n.

a soft, low voice or tone.

C15 (orig. Scots and north. Engl.): from Mid. Low Ger. and MDu. krōnen ‘groan, lament’.

以上來源於：《簡明牛津英語詞典》