| Imprecise time unit | 19 |
| Imprecise reply | 15 |
| Imprecise recipe phrase | 23 |
| Imprecise recipe amount | 23 |
| Imprecise ordinal | 17 |
| Imprecise measurement | 21 |
| Imprecise cooking measure | 25 |
| Imprecise age | 13 |
| Imprecise | 9 |
| Imprecatory remarks | 19 |
| Imprecatory remark | 18 |
| Imprecations | 12 |
| Imprecation | 11 |
| Imprecates | 10 |
| Imprecate | 9 |
| Impractically idealistic | 24 |
| Impracticality | 14 |
| Impractical, as ideas | 21 |
| Impractical wrinkle smoother [CALIFORNIA] | 41 |
| Impractical sort | 16 |
| Impractical prospect | 20 |
| Impractical person? | 19 |
| Impractical one | 15 |
| Impractical idealist | 20 |
| Impractical idea | 16 |
| Impractical activity | 20 |
| Impractical | 11 |
| Impracticably ideal | 19 |
| Impracticable | 13 |
| Impoverishment | 14 |
| Impoverished one | 16 |
| Impoverished existence | 22 |
| Impoverished | 12 |
| Impoverish | 10 |
| Impounds | 8 |
| Impound lot charge | 18 |
| Impound for the duration | 24 |
| Impound | 7 |
| Impotent | 8 |
| Imposture | 9 |
| Imposts | 7 |
| Impostors | 9 |
| Impostor, for short | 19 |
| Impostor's excuse? | 22 |
| Impostor's cover | 20 |
| Impostor in a sheikdom? | 23 |
| Impostor | 8 |
| Imposters | 9 |
| Imposter's forte | 20 |
| Imposter pretending to be from Manama? | 38 |
| Imposter | 8 |
| Impost at Aqueduct | 18 |
| Impost | 6 |
| Impossibly perfect | 18 |
| Impossibly ideal | 16 |
| Impossibles song "Erin With ___" | 42 |
| Impossible-to-complete endeavor | 31 |
| Impossible, like an upset victory | 33 |
| Impossible, and hint to this puzzle's theme | 47 |
| Impossible! | 11 |
| Impossible to understand | 24 |
| Impossible to top | 17 |
| Impossible to tell apart | 24 |
| Impossible to see through | 25 |
| Impossible to read | 18 |
| Impossible to move | 18 |
| Impossible to miss | 18 |
| Impossible to get close to | 26 |
| Impossible to forget | 20 |
| Impossible to duplicate | 23 |
| Impossible to do | 16 |
| Impossible to change | 20 |
| Impossible to achieve | 21 |
| Impossible thing to get | 23 |
| Impossible score, in U.S. football | 34 |
| Impossible score in football | 28 |
| Impossible quantity of Lay's potato chips to eat? | 53 |
| Impossible point total in American pro football | 47 |
| Impossible number in a football score | 37 |
| Impossible Missions Force leader Jim | 36 |
| Impossible Missions Force leader | 32 |
| Impossible math instruction | 27 |
| Impossible fancy | 16 |
| Impossible dreams | 17 |
| Impossible dream | 16 |
| Impossible cribbage hand | 24 |
| Impossible cribbage game result | 31 |
| Impossible | 10 |
| Impossibility of reconciling what is and what ought to be | 57 |
| Impossibility if you keep your mouth shut | 41 |
| Impossibility for a monotheist | 30 |
| Imposition on drinking with recycling? | 38 |
| Imposing, diversionary facade | 29 |
| Imposing WWI weapon | 19 |
| Imposing work | 13 |
| Imposing Wimbledon presence in the '80s-90s | 47 |
| Imposing taxes | 14 |
| Imposing swarm | 14 |
| Imposing structures | 19 |
| Imposing structure | 18 |