What's the difference between
and
Enter two words to compare and contrast their definitions, origins, and synonyms to better understand how those words are related.

Upon vs Undergo - What's the difference?

upon | undergo |

As a preposition upon

is being above and in contact with another.

As an adverb upon

is being the target of an action.

As a verb undergo is

(obsolete) to go or move under or beneath.

upon

English

Alternative forms

* vpon (obsolete)

Preposition

(English prepositions)
  • Being above and in contact with another.
  • :
  • *{{quote-book, year=1899, author=(Hughes Mearns)
    • , title= , passage=Yesterday, upon the stair / I met a man who wasn’t there / He wasn’t there again today / I wish, I wish he’d go away …}}
  • Being directly supported by another.
  • :
  • :
  • Being followed by another so as to form a series.
  • :
  • At a prescribed point in time.
  • :
  • .
  • *
    • , title=(The Celebrity), chapter=5 , passage=Although the Celebrity was almost impervious to sarcasm, he was now beginning to exhibit visible signs of uneasiness, the consciousness dawning upon him that his eccentricity was not receiving the ovation it merited.}}
  • *
  • *:Little disappointed, then, she turned attention to "Chat of the Social World," gossip which exercised potent fascination upon the girl's intelligence.

    • Usage notes

    A somewhat elevated word; the simpler, more general term on is generally interchangeable, and more common in casual American speech. In poetic or legal contexts, upon is common.

    Synonyms

    * (all senses) on * (time) at

    Adverb

    (-)
  • Being the target of an action.
    • He was set upon by the agitated dogs
  • Incidental to a specified point in time or order of action; usually combined with here-, there- or where-.
    • The clock struck noon, whereupon the students proceeded to lunch.

    Derived terms

    * hereupon * thereupon * whereupon

    Statistics

    *

    undergo

    English

    Verb

  • (obsolete) To go or move under or beneath.
  • To experience; to pass through a phase.
  • * {{quote-magazine, date=2013-01-01
    • , author=Paul Bartel, Ashli Moore , title=Avian Migration: The Ultimate Red-Eye Flight , volume=101, issue=1, page=47–48 , magazine= citation , passage=Many of these classic methods are still used, with some modern improvements. For example, with the aid of special microphones and automated sound detection software, ornithologists recently reported […] that pine siskins (Spinus pinus ) undergo an irregular, nomadic type of nocturnal migration.}}
    The project is undergoing great changes.
  • To suffer or endure; bear with.
    • The victim underwent great trauma.
    She had to undergo surgery because of her broken leg.

    Anagrams

    * English irregular verbs