| Inadvisable action | 18 |
| Inadvisable activity | 20 |
| Inadvisable advice | 18 |
| Inadvisable thing to do, usually, in the mail | 45 |
| Inalienable items | 17 |
| Inalienable list, briefly | 25 |
| Inamorata | 9 |
| Inamorata of Tarzan | 19 |
| Inamorata of Valentino | 22 |
| Inamorata, say | 14 |
| Inamoratas | 10 |
| Inamorato | 9 |
| Inane | 5 |
| Inane (Var.) | 12 |
| Inane babysitter? | 17 |
| Inane behavior | 14 |
| Inane goings-on | 15 |
| Inane Laconian serf? | 20 |
| Inane museum question | 21 |
| Inane one | 9 |
| Inane ones | 10 |
| Inane relative? | 15 |
| Inanimate | 9 |
| Inanimate carousel rider | 24 |
| Inanimate land tract? | 21 |
| Inanimate object | 16 |
| Inanimate secretary | 19 |
| Inanimate zodiac sign | 21 |
| Inanity | 7 |
| Inappropriate | 13 |
| Inappropriate behavior | 22 |
| Inappropriate ceremony? | 23 |
| Inappropriate feeling? | 22 |
| Inappropriate for aristos | 25 |
| Inappropriate for high-class Brits | 34 |
| Inappropriate for on-the-job viewing, in Web shorthand | 54 |
| Inappropriate for the easily offended, say | 42 |
| Inappropriate glance | 20 |
| Inappropriate look | 18 |
| Inappropriate looker | 20 |
| Inappropriate name | 18 |
| Inappropriate Neil Diamond single "Girl, You'll Be a Woman ___" | 77 |
| Inappropriate on a honeymoon? | 29 |
| Inappropriate pew wear? | 23 |
| Inappropriate public sculpture | 30 |
| Inappropriate TSA examinations? | 31 |
| Inappropriate, in a way | 23 |
| Inappropriately | 15 |
| Inappropriately appropriate | 27 |
| Inappropriately excessive | 25 |
| Inappropriately inquisitive | 27 |
| Inappropriately involved | 24 |
| Inappropriately used therapeutic jargon | 39 |
| Inaptitude for music | 20 |
| Inarguable | 10 |
| Inarticulate | 12 |
| Inarticulate comebacks | 22 |
| Inarticulate expression of disbelief | 36 |
| Inarticulate grunt | 18 |
| Inarticulate pauses | 19 |
| Inarticulate toon | 17 |
| Inarticulate utterance | 22 |
| Inasmuch (as) | 13 |
| Inasmuch as | 11 |
| Inattention | 11 |
| Inattention indications | 23 |
| Inattentive | 11 |
| Inattentive "at the switch," in a saying | 50 |
| Inattentive error | 17 |
| Inattentive one | 15 |
| Inattentive ones | 16 |
| Inattentive type | 16 |
| Inaudible | 9 |
| Inaudible, in a way | 19 |
| Inaugural ball holder | 21 |
| Inaugural ball, e.g. | 20 |
| Inaugural Ball, for one | 23 |
| Inaugural balls | 15 |
| Inaugural balls, e.g. | 21 |
| Inaugural balls? | 16 |
| Inaugural baseball Hall of Famer Ty | 35 |
| Inaugural Davis Cup winner | 26 |
| Inaugural event | 15 |
| Inaugural event? | 16 |
| Inaugural feature | 17 |
| Inaugural figure | 16 |
| Inaugural highlight | 19 |
| Inaugural oath starter | 22 |
| Inaugural parade unit | 21 |
| Inaugural performance | 21 |
| Inaugural pledge | 16 |
| Inaugural poet: Jan. 1961 | 25 |
| Inaugural reading | 17 |
| Inaugural recitation | 20 |
| Inaugural recitations | 21 |
| Inaugural response | 18 |
| Inaugural ritual | 16 |
| Inaugural rituals | 17 |
| Inaugural Rock and Roll Hall of Fame inductee | 45 |
| Inaugural statement | 19 |