understate

To state with less completeness or truth than seems warranted by the facts.

To express with restraint or lack of emphasis, especially ironically or for rhetorical effect.

To state (a quantity, for example) that is too low.

To state or represent less strongly than the truth will admit; state too low: as, to understate an evil.

To say less than the full truth.

To state or represent less strongly than may be done truthfully.

to state something with less completeness than needed; to minimise or downplay.

to state something with a lack of emphasis, in order to express irony.

to state a quantity that is too low.

represent as less significant or important