verb

underpin

/ʌndərˈpɪn/ · say it: UN·der·PIN

to support or form the basis of

In Formal & Academic

In more detail

1. (verb) to provide support or a foundation for something, either physically or by providing reasons or evidence

2. (verb) to support a building or structure from underneath with a strong foundation or props

Examples

1. Strong research underpins the conclusions of this study.
2. The engineer decided to underpin the old house before renovating it.

How to use underpin

Underpin is used to describe either physical support (especially in construction) or abstract support through evidence, logic, or reasoning. In academic and professional contexts, it often appears when discussing the foundations of arguments, policies, or theories. The abstract sense is more common in modern usage than the literal construction sense.

Common phrases

underpin an argument
underpin a theory
underpin a claim
underpin economic growth
underpin a structure

Synonyms

support · buttress · prop up · strengthen · sustain

Opposites

weaken · undermine

Word family

underpinning (noun/gerund) · underpinned (past tense)

A common mistake

Learners sometimes confuse underpin with undermine; underpin means to support or strengthen, while undermine means to weaken or damage.

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