if and when

Upon possible occurrence

If and when signals that something will happen only under certain conditions, and possibly not at all.

The phrase hedges against assuming an outcome: We'll deal with that if and when it happens.

Critics sometimes call it redundant, but the doubling serves a purpose—"if" acknowledges uncertainty while "when" implies readiness for the possibility.

Related

contingency · proviso · stipulation · just in case · on the off chance · happen · if and only if · after · as soon as · scenario · assumption · supposition · uncertain · prerequisite · occurrence · at some point · down the road · sooner or later

Opposites
certainty and definiteness

if and whendefinitely

With complete certainty

certainly · absolutely · without fail · guaranteed · for sure

temporal specificity

if and whenscheduled

Arranged for specific time

on the dot · on schedule · punctually · right on time

Family

when, whenever, whence

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G