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thou

/ðaʊ/

Archaic singular second-person subject pronoun

From Proto-Indo-European tu (second-person singular pronoun).

pronoun
verb
tu
Proto-Indo-European
Verified
*túh
reconstructed
Second-person singular pronoun, “you, thou”

from Proto-Indo-European *túh₂ (“you, thou”).

Proto-Germanic
Verified
*þū
reconstructed
Singular “you,” inherited across Germanic languages

from Old English þū

Old English
Verified
þū
Nominative singular subject pronoun

from Old English þū

Middle English
Verified
thou
Survived especially in northern and dialectal English

from Middle English thou, tho, thogh, thoue, thouȝ, thow, thowe, tou, towe, thu, thue, thugh, tu, you (Northern...

Modern English
thou

Long before English acquired the socially convenient all-purpose “you,” it had a sharply singular thou, inherited from the tiny pronoun *túh. That same ancient speck of language appears in Latin tu, Spanish tú, French tu, German du, and Welsh ti—an astonishing family resemblance scattered across Europe. In English, “you” began as a plural form used for respect toward superiors, and by about 1450 thou could sound insulting when aimed at an inferior, though parents, lovers, Quakers, and religious writers kept it alive. The grammar became wonderfully visible: thou art, thou hast, and thou dost, with the verb wearing its little -(e)st badge. Today “thou” may sound like a stained-glass window speaking, but it is really an ancient linguistic fingerprint: one small word that still connects an English speaker to Latin tu and Sanskrit-era pronouns.

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