in-

Prefix meaning inside

In- is a prefix with two distinct origins and opposite effects.

One in- means "not" or "opposite of," negating whatever follows: incomplete, invisible, injustice.

The other in- means "in" or "into," indicating direction or intensification: influx, insight, instill.

Before certain consonants, in- becomes il- (illegal), im- (impossible), or ir- (irregular).

Context usually makes clear which in- is at work.

negation

inability

Lack of capacity

inaccurate · inactive · incomplete · incorrect · indefinite · indirect · ineffective · inefficient · inexact · inexperience

inward

intake

Amount received or consumed

indoor · inflow · ingrown · inhale · inject · inland · inlet · inmate · inner · insert

intensive

inflame

Intensify emotion or irritation

indoctrinate · implore · impress · imprint · inspire · incite · insist · intent · intense · inquire

Categories
Opposites
direction/location

in-ex-

Prefix meaning former

out- · e- · extra- · dis- · de-

polarity

in-un-

Negating prefix

non- · dis- · a- · anti-

Family

in, inept, input, incur

Familiarity
Top 1,000,000
Profile
Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G