understate

under- +‎ state

understate (third-person singular simple present understates, present participle understating, simple past and past participle understated)

1. (transitive) To state (something) with less completeness than needed; to minimise or downplay.
2. (transitive) To state (something) with a lack of emphasis, in order to express irony.
3. To state a quantity that is too low.

• (state with lack of emphasis): trivialize

• overstate, exaggerate

• understatement

• undertaste