by word of mouth

US /baɪ wɜrd əv maʊθ/
UK /baɪ wɜrd əv maʊθ/
"by word of mouth" picture
1.

口コミで, 口頭で

through people telling each other rather than through advertisements, etc.

:
Most of our business comes by word of mouth.
私たちのビジネスのほとんどは口コミで来ています。
The news spread quickly by word of mouth.
そのニュースは口コミで急速に広まった。