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Thereto vs Thereby - What's the difference?

thereto | thereby |

As adverbs the difference between thereto and thereby

is that thereto is (archaic|quaint) to that while thereby is (formal) by it, by that.

thereto

English

Adverb

(-)
  • (archaic, quaint) To that.
  • I require the operating manual thereto .
  • * c. 1430' (reprinted '''1888 ), Thomas Austin, ed., ''Two Fifteenth-century Cookery-books. Harleian ms. 279 (ab. 1430), & Harl. ms. 4016 (ab. 1450), with Extracts from Ashmole ms. 1429, Laud ms. 553, & Douce ms. 55 [Early English Text Society, Original Series; 91], London: 374760, page 11:
  • Soupes dorye. — Take gode almaunde mylke
  • (archaic, quaint, or, poetic) To it.
  • A man who allows wild passion to arise within, himself burns his heart, then after burning adds the wind that thereto which ignites the fire again, or not, as the case may be. —Jack Kerouac

    thereby

    English

    Adverb

  • (formal) By it, by that.
  • * 1729 , :
  • Thirdly'', Whereas the Maintainance of an hundred thousand Children, from two Years old, and upwards, cannot be computed at less than Ten Shillings a piece ''per Annum'', the Nation's Stock will be thereby encreased fifty thousand pounds ''per Annum'', besides the profit of a new Dish, introduced to the Tables of all ''Gentlemen of Fortune in the Kingdom, who have any refinement in Taste, and the Money will circulate among our selves, the Goods being entirely of our own Growth and Manufacture.
  • * 1787 , :
  • This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby , any Thing in the Constitution or Laws of any State to the Contrary notwithstanding.