How to use a dictionary ? The exemple of the word "BOTH".
Imagine that you have no knowledge about two characters, so you lack of context about them, and that you don't fully understand some sentences in the comic book that you are reading.
For exemple :
"And though the power both men spit out is enough to shred entire worlds Captain America knows they are actually still holding back !"
Let's focus :
"The power both men spit out is enough is enough to shred entire worlds"
If you lack of knowledge about the characters, you surely don't know that during this story Genis-Vell is on the verge to destroy the Universe so he can actually destroy entire worlds while holding back and if you lack of knowledge about The Sentry, you probably don't know that since the beginning of his mini-serie he is considered as an Universal-threat and that he released at least "the energy of a single planet" against Absorbing Man without exerting himself at all as he was probably holding back as the notion of exertion require a vigorous effort.
But imagine that a casual reader have this comic book in his hands and try to understand what is happening.
How do we use "both" in the English language ?
http://www.thefreedictionary.com/both
Usage Note: Both indicates that the action or state denoted by the verb applies individually to each of two entities. Both books weigh more than five pounds, for example, means that each book weighs more than five pounds by itself, not that the two books weighed together come to more than five pounds. Both is inappropriate where the verb does not apply to each of the entities by itself. · In possessive constructions, of both is usually preferred in standard usage: the mothers of both (rather than both their mothers); the fault of both (rather than both their fault or both's fault). · When both is used with and to link parallel elements in a sentence, the words or phrases that follow them should correspond grammatically: in both India and China or both in India and in China (not both in India and China).
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The starting sentence :
"The power both men spit out is enough is enough to shred entire worlds"
Reformulation :
"Both men spit out enough power to shred entire worlds", means that each man spit enough power by himself to shred entire worlds.
To summarize :
The Sentry has enough power to shred entire worlds while holding back.
Genis-Vell has enough power to shred entire worlds while holding back.