Undergo
Verb
Pronunciation  and accent: ʌndəgəʊ 
Etymology: it is analysable into under- and go.
Preterite tense: underwent 
Preterite participle: undergone 
Present participle: undergoing
Third-person singular simple present: undergoes
Transitively:
Obsolete and pristine uses: a. To go, or move under or underneath. b. To undermine 
Still in general use:
First definition (The subject is a person or other  animal): to have the  experience of; to be consciously affected by (something unpleasant, as danger,  etc.) 
Antonyms: to evade, shun, forgo, avoid, eschew 
Synonyms: to feel, experience, suffer
It may be translated by sufrir in Spanish; subir, in French; subire, in Italian
In this  expedition he underwent many dangers and difficulties,  without any profit, but returned safe to Falmouth.
Robert  Kerr (…  Voyages and Travels) 
[…] the  bore of undergoing his eloquence is really becoming  insufferable.
The  Spectator, Volume 13
In every  contemplation our curiosity must be first excited by the appearances of things,  before our reason undergoes the fatigue of investigating the  causes.
Oliver  Goldsmith (Letters from a citizen…)
[…] it was  late before they retired, […] to take that rest of which, after the doubt and  suspense they had recently undergone, they stood much in need.
Charles  Dickens (Oliver  Twist)
Second definition (The  subject is something or someone): to be subjected to; to be the object of (an action, or a process, as an inspection,  an examination, etc.) 
I have  finished four acts, and part of the fifth of a tragedy […].The few friends who  have seen it express the strongest approbation of the fable, the conduct, the  situations, and diction; but as their praises may be addressed rather to my  diffidence than to the merits of the piece, I must remain in a state of  uncertainty till it undergoes your inspection.
David  Garrick (The Private Correspondence) 
Heat or  fire is a violent agent, which changes all bodies that undergo its action.
The  Farmer's Magazine
[…] earth  has undergone any considerable refrigeration, it  must also have undergone a contraction of dimensions.
Robert  Bakewell (An  Introduction to Geology) 
[…]  although the storm continued, the temperatures underwent an extraordinary change.
Elisha Kane (Arctic explorations) vol. II
[…] the air  became quite still, and the snow underwent a wonderful change.
John  Tyndall (The Glaciers of the  Alps) 
His eyes  were abnormally large, and round like those of a cat. The pupils, too, upon any  accession or diminution of light, underwent contraction or dilation, just such  as is observed in the feline tribe.
Edgar  Poe
My notice  was soon afterwards attracted by the duskyred appearance of the moon, and the  peculiar character of the sea. The latter was undergoing a rapid change, and the water  seemed more than usually transparent.
Edgar  Poe
This  process is facilitated by certain remarkable changes of colour which appear in  it [steel] as it undergoes this process of a second heating.
Henry  Moseley (Illustrations of mechanics) 
A friend of  hers (by name, Mr. M-y) was invited by her to accept the accommodation of her  house, while his own underwent some necessary repair. 
Elizabeth  Burgess (… Betty Bolaine) 
After he  had gone, Randal, being left alone, underwent a change of mood.
Catherine Bement (Spinner of Webs)
The wine had evidently produced in them a species of delirium,  which, perhaps, I had been prevented from feeling by the immersion I had undergone since drinking it. 
Edgar  Poe
We reached the landing about five, but with the delay at the barrier, by  the custom-house officers, who are very strict, where we underwent the most rigid scrutiny and overhauling our baggage,  which is excessively annoying
 C. T. Cromwell  (Over the ocean)
The fellow  made no answer, but eyed me from head to foot with a look a puzzled  incredulity. I was rapidly losing my temper while undergoing his inspection, and was about  repeating the assault, when in a half audible voice he ejaculated…
Bentley's  Miscellany, Volume 9
[…]  after undergoing many romantic adventures, not  unlike those of Charles the Second, he [Charles Edward] escaped to France.
Charles  Dickens (A  child’s history) 
Many of our  farm implements have undergone improvement ; yet there are others  which have been either but partially introduced, or are hardly known, that are  calculated to abridge labor and to increase the profits of the farm.
Thomas  Fessenden (The New  England Farmer) 
Derived from undergo: undergoing 
