英和和英

前置詞

on to

1. Upon; on top of.

   My cat just jumped on to the keyboard.

2. (informal) Aware of.

   The thought-police were on to my plans of world domination.

   • 2022 January 12, Ross Douthat, “Let’s Not Invent a Civil War”, in The New York Times‎^[1], ISSN 0362-4331:

     Fortunately “the F.B.I. was on to them” and foiled the plot, but the alleged kidnapping conspiracy, Walter argues, is a harbinger of worse to come.

3. Used to indicate, or signpost, logical progression to a new topic in a talk or discourse.

   Now. On to the system of active water uptake.

   Let's go on to item 3 in the list.

語源

From on +‎ to, after into. Compare Saterland Frisian antou (“up to”).

発音

• (強勢)
  • (英国発音) IPA^(key): /ˈɒn.tuː/
    • (米国発音) IPA^(key): /ˈɑn.tu/
  • (弱勢, before consonants) IPA^(key): /ˈɒn.tə/
  • (弱勢, before vowels) IPA^(key): /ˈɒn.tʊ/
  • 韻: (弱勢, before consonants) -ɒntə
  • ハイフネーション: on‧to

前置詞

onto

1. Arriving upon or on top of (speaking of a physical または metaphorical movement).

   My cat just jumped onto the keyboard.

   • 2013 June 22, “Engineers of a different kind”, in The Economist, volume 407, number 8841, page 70:

     Private-equity nabobs bristle at being dubbed mere financiers. Piling debt onto companies’ balance-sheets is only a small part of what leveraged buy-outs are about, they insist. Improving the workings of the businesses they take over is just as core to their calling, if not more so. Much of their pleading is public-relations bluster.

2. (informal) Aware of.

   The thought-police were onto my plans of world domination.

3. (mathematics) Being an onto function with a codomain of (see below).

   The exponential function maps the set of real numbers onto the set of positive real numbers.

派生語

形容詞

onto (not comparable)

1. (mathematics, of a function) Assuming each of the values in its codomain; having its range equal to its codomain.

   Considered as a function on the real numbers, the exponential function is not onto.

同意語

• (数学): surjective

参考

• (数学): one-to-one, injective, bijective

参考

• unto

アナグラム

• Noto, Toon, noot, noto-, oont, tono-, toon