the word 'terrifying' is built upon the latin verb 'terrere', meaning 'to frighten'. this root passed into english via old french 'terrifier', forming the verb 'terrify'. the addition of the '-y' suffix creates the adjective 'terrify', an archaic or poetic form meaning 'frightful'. the modern participial adjective 'terrifying' intensifies this meaning by adding the '-ing' suffix, a common english grammatical construction that denotes an active, ongoing quality. thus, the word's literal sense of 'causing fright' evolved from a classical root into its current abstract meaning of inspiring extreme fear or dread.

Structure: terrif (frighten) + y (adjective suffix) + ing (present participle suffix) - terrif: derived from latin 'terrere', meaning 'to frighten, to terrify'. functions as the verbal root. - y: a common english suffix used to form adjectives from nouns or verbs (e.g., 'juicy', 'runny'). here, it forms the adjective 'terrify' from the root. - ing: the present participle suffix, which, when added to an adjective, can intensify its meaning or form a participial adjective.