Thy vs. Thine: Meaning, Difference, and Examples

Thy and thine belong to the older singular thou set. They are related in the same way that modern your and yours are related, but older writing adds one extra pattern before vowel sounds.

Thy and thine at a glance

Use thy before a noun

Thy is a possessive determiner. It identifies the owner of the noun that follows it, just as modern your does.

The possessed thing can be singular or plural. Thy book and thy books are both correct because thy describes one person as the possessor, not the number of things possessed.

Use thine when the noun is absent

Thine is an independent possessive pronoun. It replaces the combination of possessive word plus noun when the thing being discussed is already clear.

A quick modern-English test works well: if your fits, try thy; if yours fits, choose thine.

Why does thine sometimes come before a noun?

Older English often used thine before a word beginning with a vowel sound, and some reference works also note its use before h. This pattern resembles older pairs such as my/mine: my hand, but mine eyes.

The sound matters more than the written letter. More importantly, real usage varied across periods, regions, and writers. For clear creative prose, use the pattern consistently rather than treating it as an absolute rule for every historical text.

Is it thy own or thine own?

Thine own is the conventional older form because own begins with a vowel sound. Shakespeare’s works provide familiar patterns such as thine own state. In modern fantasy dialogue, phrases such as choose thine own path and trust thine own judgment follow the same pattern.

Thy, thine, and the rest of the thou set

Thy and thine show possession, but they do not replace thou or thee. The four forms have separate grammatical jobs.

For subject, object, and matching verb forms such as thou art and thou hast, read the complete Thou vs Thee guide.

Six common mistakes

1. Leaving thy without a noun: write the book is thine, not the book is thy.
2. Using thine as the subject: write thou art ready, not thine art ready.
3. Adding an apostrophe: thine already means yours; do not write thine’s.
4. Using thyself for possession: thyself is reflexive, as in know thyself; it does not mean yours.
5. Assuming thy is plural: both thy and thine belong to the singular thou set, even when the possessed noun is plural.
6. Forcing every historical variant: consistent, readable usage is better than mixing rules from different centuries and dialects.

Copy-ready examples for dialogue

These lines use the forms consistently while keeping the surrounding English readable. Browse more medieval English phrases, try the Medieval Fantasy Translator, or use the Shakespeare Translator for Early Modern English-style writing and interpretation.

Frequently asked questions

What is the difference between thy and thine?

Thy usually means your and comes before a noun, as in thy sword. Thine usually means yours and stands without a following noun, as in the sword is thine.

When does thine come before a noun?

In older usage, thine can come before a noun beginning with a vowel sound and sometimes h, as in thine eyes or thine honor. Historical usage varied, so this is a useful pattern rather than a rule that every writer followed identically.

Is it thy own or thine own?

Thine own is the conventional older form because own begins with a vowel sound. For example: choose thine own path.

Not sure whether the older voice you want is historical or creative? See Medieval English vs Middle English. For the older direction words used in journeys and commands, read Hither, Thither, and Whither.

Try thy and thine in the translator