freeze, become/grow stiff/rigid (through fear); grow quite/very still
Latin word, found 16 times in the texts on Socratos.
Vergil, Aeneid 3.260: deriguit; cecidere animi, nec iam amplius armis,
Ovid, Metamorphoses 2.348: deriguisse pedes. Ad quam conata venire
Lucan, Civil War 3.613: Deriguitque tenens strictis immortua nervis.
All forms of derigesco