noun
unamiability; lack of charm
Refers to a person's inherent lack of friendliness or charm; often used as a noun to describe someone's character.
彼の無愛嬌は、初対面の人を戸惑わせる。
His unamiability confuses people meeting him for the first time.
na-adjective
Describes behavior or attitude that is blunt, unsociable, or lacking warmth; used adjectivally with な.
店員の無愛嬌な対応にがっかりした。
I was disappointed by the clerk's brusque manner.
彼はいつも無愛嬌で、あまり話さない。
He is always unfriendly and doesn't talk much.
Compound of 無 (without) and 愛嬌 (charm, amiability). The variant 無愛敬 uses 愛敬, an alternative form of 愛嬌.