אבן-נגף

Meaning: Stumbling Block, Obstacle, Hinderance

Literally: Obstacle/blocking stone
Pronounced: Even, Ne'Gef
Source: Biblical, Isaiah 8:14- וְהָיָ֖ה לְמִקְדָּ֑שׁ וּלְאֶ֣בֶן נֶ֠גֶף , And he shall be a sanctuary and a stumbling stone...