Found in your own question, the answer is "The" !
"Is" is.
"What"
Microsoft Word, probably the most widely used word-processing software, is part of the Microsoft Office suite, which includes Microsoft's PowerPoint presentation program and Excel spreadsheet program.
the French word is 'présentation' (fem.), but 'powerpoint' is the most widely used.
The letter is used almost in every word you use and it's the most popular letter.
No, but if it is widely used it make become a 'real word'.
The most common abbreviation for finish is FIN. This abbreviation is not used widely though as most people will write out the full word instead of using FIN.
'e' is the most common letter. . . the most common word is 'the'. . . after 'e' idk. . .XD . . .X3
Traitor.
The other word which is widely used instead of doorknob is latch.
Tablet?
Mother and me are commonly used words. They begin with the letter m.
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The letter "R" is not a verb; it is a letter in the English alphabet. Verbs are words that describe an action, state, or occurrence.