substantiate
B2CEFR level
45/100Rarity: uncommon
FormalRegister
General verb
To provide evidence that proves the truth or validity of a claim.
The author fails to substantiate her sweeping generalisation about medieval literacy.
Medicine verb
To provide evidence that supports or proves a claim.
The scan results helped substantiate the suspected diagnosis noted in the referral.
Business verb
To provide evidence that confirms or supports a claim or theory.
The audit team asked management to substantiate the projected cost savings with detailed supplier contracts.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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