p. p. & a. See Aghast. [ 1913 Webster ]

n. 1. 1 giant hyssop; Mexican hyssop.
Syn. -- genus Agastache. [ WordNet 1.5 ]

a. [ Gr. 'a priv. + gasth'r stomach. ] (Physiol.) Having to stomach, or distinct digestive canal, as the tapeworm. [ 1913 Webster ]

or v. t. To affright; to terrify. [ Obs. ] Chaucer. Spenser. [ 1913 Webster ]