Dict: strongs - shudder
Strongs:
H2729 @ חרד chârad khaw-rad' A primitive root; to shudder with terror; hence to fear; also to hasten (with anxiety): - be (make) {afraid} be {careful} {discomfit} fray ({away}) {quake} tremble.
H7460 @ רעד râ‛ad raw-ad' A primitive root; to shudder (more or less violently): - tremble.
H7461 @ רעדה רעד ra‛ad re‛âdâh {rah'-ad} reh-aw-daw' From H7460; a shudder: - {fear} trembling.
G5425 @ φρίσσω phrissō fris'-so Apparently a primary verb; to bristle or chill that is shudder (fear): - tremble.