| English | Russian |
| know better | уже соображать, что к чему (о детях • Two of his pals, who should know better, played a prank on him. 4uzhoj) |
| know better | понимать, что можно и что нельзя (Two of his pals, who should know better, played a prank on him. Val_Ships) |
| know-how | наработки (some contexts Tanya Gesse) |