| Inactive state | 14 |
| Inactive Tool song? | 19 |
| Inactive transporter, briefly | 29 |
| Inactive volcano, Mauna ___ | 27 |
| Inactive, as a volcano | 22 |
| Inactive, in a way: Abbr. | 25 |
| Inactive: Abbr. | 15 |
| Inactively | 10 |
| Inactiveness | 12 |
| Inactivity | 10 |
| Inadequate | 10 |
| Inadequate in Soho | 19 |
| Inadequate (whose initials spell "testicles") | 55 |
| Inadequate action | 17 |
| Inadequate specimen | 19 |
| Inadequate supply | 17 |
| Inadequate, as an excuse | 24 |
| Inadequate, in Soho | 19 |
| Inadequately | 12 |
| Inadmissible testimony of a sort | 32 |
| Inadvertence | 12 |
| Inadvertency | 12 |
| Inadvertent creator of phrases like "well-boiled icicle" | 66 |
| Inadvertent digital-image waves | 31 |
| Inadvertent mistakes | 20 |
| Inadvertent nocturnal activity | 30 |
| Inadvertent omission | 20 |
| Inadvertent remark | 18 |
| Inadvertent revelations | 23 |
| Inadvertently destructive sort, literally | 41 |
| Inadvertently reveal | 20 |
| Inadvertently revealing remark | 30 |
| 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 |