- ill-use
- in disagreement
- insides
- in the blood
- in times gone by
- in one's dotage
- invest with
- instinctively
- in sooth
- indocrinate
- in view
- instruments
- in the air
- in extremis
- in safe hands
- inch
- interdependent
- in contrast to
- in the know about
- inhabitants
- informal soft-soap
- intuitional
- incredulously
- in two shakes
- irenic
- informal do out of
- interceder
- informal make head or tail of
- in a flap
- indoctrination
- in a state of uncertainty
- inebriety
- in disagreement with
- in a class of its own
- informal terribly
- inadequately
- inconsistently
- in league
- in an acting capacity
- impotence
- incomparability
- impecunious-ness
- in bygone days
- in store
- idioms
- irresoluteness
- in confusion
- in uproar
- immolation
- imagined
- in a hurry
- illumining
- in the picture
- informal be the boss of
- in no time
- ineradicable
- in a state of nature
- ill breeding
- I'll say
- in one's cups
- initialize
- in time past
- in-depth
- irrefutably
- in tick
- invariability
- impinge on
- ill-informed
- indelicacy
- iron-fisted
- in the affirmative
- invest in
- ideal place
- in re
- intending
- in a delicate condition
- idealized
- inspirit
- involuted
- in an instant
- intelligencer
- in the know
- in the midst of in the course of
- infuriated
- Ingra-tiating
- immutably
- in captivity
- in raptures
- iconoclastic
- I haven't the foggiest idea
- in good spirits
- ill repute
- in next to no time
- in vogue
- in contrast with
- intercessor
- immoderateness
- in one's genes
- incontrovertibly
- impanel