Thy meaning

thī
(obsolete) Because.
conjunction
3
1
Used as a modifier before a noun.
adjective
1
1
(archaic) Of, belonging to, made by, or done by thee.
possessive pronominal adjective
1
1
(archaic) That belongs to thee; the possessive form of thou.
pronoun
1
1
The definition of thy is your, or is the possessive form of thou.

An example of thy is a man making a reference to his friend's wife by saying thy wife.

adjective
1
2
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(archaic or literary) Your (informal); that belongs to you (singular).
pronoun
0
1

Origin of thy

  • Middle English variant of thin thine from Old English thīn tu- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Middle English thy "because, forwhy", shortened form of for-thy, forthy (“for that"), from Old English for þȳ [þe] (“because [that]") from for (instrumental preposition) + þȳ (“by that"), instrumental case of þæt. More at the, that.

    From Wiktionary

  • From Middle English thi, thy (“thy"), apocopated form of thin, thyn, thine (“thy", also "thine"), from Old English þīn (“thy, thine"), from Proto-Germanic *þīnaz. More at thou.

    From Wiktionary