adverb taking the 'to' particle, taru-adjective
terrified; panicked; horrified
Archaic literary word describing a state of being terrified or panicked. Used with と or in たる form. Modern equivalents include おびえた or 恐怖にかられた.
See also: 恟々
In classical texts, it is used like '恟然として色を失う' (turning pale with terror).