A low, prolonged sound made by a person or animal expressing pain, discomfort, or displeasure.
He let out a groan from the pain.
The patient is moaning in bed.
A deep, threatening sound made by an animal, or a similar aggressive human vocalization.
The dog growled threateningly.
The lion's roar echoed across the savanna.
A continuous low sound produced by machines, engines, wind, or electrical equipment.
The hum of the air conditioner bothers me and I can't sleep.
The howl of the wind could be heard outside the window.
Common mixed kanji-kana spelling; the kanji 唸 is not a jōyō kanji, so うなり声 is the most practical written form.
Full kanji spelling using the non-jōyō kanji 唸; less common but still encountered.
Irregular okurigana usage; the り is omitted. Rarely used.
Compound of 唸り (unari, the continuative form of 唸る 'to groan, growl, hum') + 声 (koe, 'voice, sound'). The kanji 唸 is a phono-semantic compound with 口 (mouth) and 念 (thought, sense), but the exact historical derivation is uncertain.