| English | Russian |
| not getting enough sleep | недосыпка (= недосыпание) |
| not quite enough | маловато |
| not to drink enough | недопить (pf of недопивать) |
| not to drink enough | недопить |
| not to drink enough | недопивать (impf of недопить) |
| there's not enough | не дохватывает |