Thy — used especially before a word beginning with a vowel or h

(Obsolete) A possessive case of the personal pronoun thou

(Homonym: yore, you're).
Possessive adjective referring to the interlocutor.

1 additional premium
2 adjective phrase
3 airplane
4 American plan
5 antipersonnel
6 arithmetic progression
7 armor-piercing
8 Associated Press
9 author's proof