Englishfor English speakers
well
Adverb
—
In a good way.
He washed the table very well, so now it is very clean.
well
Noun
—
A hole in the ground for getting water or oil.
There was no river nearby, so they dug a well to get water.
downhole
adjective
—
Occurring in the drilled bore of an oil well either underground or undersea.
seismograph
—
noun
a measuring instrument for detecting and measuring the intensity and direction and duration of movements of the ground (as an earthquake)