軟なん口こう蓋がい音おん

な

ん

こ

う

が

い

お

ん

Meanings

1

noun

velar; velar consonant

linguistics

Linguistics term for a consonant articulated with the back of the tongue against the soft palate, such as /k/, /ɡ/, or /ŋ/.

軟soft

口mouth

蓋cover, lid, flap

音sound, noise

口こう蓋がい音おん
口蓋音 is a broader term for palatal consonants, while 軟口蓋音 specifically refers to velar consonants articulated further back.
硬こう口こう蓋がい音おん
硬口蓋音 refers to palatal consonants (hard palate), whereas 軟口蓋音 refers to velar consonants (soft palate).

Compound of 軟口蓋 (soft palate) + 音 (sound). A straightforward technical term.