Thine
Definition 1 of 2
Pro Tip 1/3
Historical Usage
Thine is rarely used in modern English, but appears in historical or religious texts. Thou shalt have no other gods before me; for I the Lord thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me; showing mercy unto thousands of them that love me, and keep my commandments.
Pro Tip 2/3
Sounds Antique
Using 'thine' gives a sentence an old-fashioned tone, fitting in period dramas. Thine attire doth suit thee well, my lord.
Pro Tip 3/3
Poetic Expression
In poetry, 'thine' can add rhythm or match the poetic style of older eras. Oh wind, if winter comes, can spring be far behind? Preserve thy essence to remain, as firm as thine own determination.