Englishfor English speakers
vanish
Verb
—
If you vanish, you disappear suddenly.
—
If something vanishes, it becomes equal to zero.
The function mathf(x)=x^2/math vanishes at mathx=0/math.
completely
Adverb
—
When something is completely some quality, it is absolutely that quality, in every way.
The man was completely honest in his business.
This is completely different from what people might believe.
The discovery has given us a completely new way of looking at thing.