고어체에서 'thou'의 재귀형 또는 강조형으로 쓰여 '그대 자신'을 이르는 말.
An archaic second-person singular pronoun used as the reflexive or emphatic form of 'thou'.
예문:
"Thou shouldst be ashamed of thyself for such behavior."
"Prepare thyself for the journey that lies ahead."
"Thou must be honest with thyself before thou canst be honest with others."