From an unused root (meaning to push over); a stumbling-block -- slanderest.
H1848. dophi
[דֳּפִי] noun [masculine] blemish, fault תִּתֶּןֿדֹּפִי׃ בְּבֶןאִֿמְּךָ Psalm 50:20 against thy mother's son thou dost allege a fault ("" תְדַבֵּ֑ר בְּאָחִיךָ).