underemphasis

un·der·em·pha·size

U0050600 (ŭn′dər-ĕm′fə-sīz′)tr.v. un·der·em·pha·sized, un·der·em·pha·siz·ing, un·der·em·pha·siz·es To fail to give enough emphasis to.
un′der·em′pha·sis (-sĭs) n.

underemphasis

(ˌʌndərˈɛmfəsɪs) n, pl -ses (-siːz) a lack of emphasis