You want an abbreviation for a four letter word? How lazy are you anyway?
In chemistry and physics, the usual symbol for work in an equation is W or Q.
H2O
wrtg
H2o
WIFI
The contraction for "who is" = who's. It is not called an abbreviation.
There are a number of possible meanings for the abbreviation TWL. Some of these include Tournament Word List, The Weakest Link, Total Weight Loss and Top Water Level.
The abbreviation HCTZ commonly stands for the pharmaceutical drug hydrochlorothiazide. It is a diuretic which stops the kidneys from retaining water. In doing this it also is able to maintain ones calcium.
The abbreviation of "have not" is "haven't."
The abbreviation of electron is e−.
The medical abbreviation for water is H2O
H2O
The contraction for "who is" = who's. It is not called an abbreviation.
pH
It doesn't have an abbreviation per se. Its atomic symbols is Na.NA
mt = mountain water
It means: National Water and Sewage Authority
Dextrose 5% In Water (IV)
TWE stands for Tap Water Enema.
The abbreviation is AAS.The abbreviation is AAS.The abbreviation is AAS.The abbreviation is AAS.The abbreviation is AAS.The abbreviation is AAS.
°C (Example: 0°C is the freezing point of water)
The abbreviation for abbreviation is "abbr."