underemphasize

[ uhn-der-em-fuh-sahyz ]
/ ˌʌn dərˈɛm fəˌsaɪz /

verb (used with object), un·der·em·pha·sized, un·der·em·pha·siz·ing.

to give less than sufficient emphasis to; minimize.
Also especially British, un·der·em·pha·sise.

Origin of underemphasize

First recorded in 1965–70; under- + emphasize