underpin
verb/ˌʌndərˈpɪn/
Frequency rank: #17,658 of 20,003 in the WORDED list (wordfreq data)
Meaning
to support or form the basis of something.

Example sentence
Strong evidence will underpin the argument presented in the report.
Synonyms & related words
More words in ranks 17,601–17,700
- trustworthinessThe quality of being reliable, honest, and deserving of trust.
- unadulteratedPure and complete, not mixed with anything else or made weaker in any way.
- undeclarednot officially announced, reported, or acknowledged.
- undercurrenta hidden feeling or influence that is not openly expressed but affects a situation.
- undergrowthlow-growing plants, shrubs, and vegetation beneath taller trees in a forest.
- unseemlyNot appropriate or proper for the situation; indecent or unbecoming.
- unsympatheticshowing no sympathy or understanding toward others' feelings or problems.
- unyieldingNot giving way; firm and inflexible.
- walea ridge or raised line on a surface, especially a ribbed texture on woven fabric.
- wenchan archaic or informal term for a young woman, often a serving girl or barmaid.