Englishfor English speakers
toxicity
—
noun
the degree to which something is poisonous
—
noun
(= perniciousness)
grave harmfulness or deadliness
test
Noun
—
A test is writing that many learners do in a room at the same time so that people are able to see how much knowledge the learners have.
I'm happy because I got a high mark on the test.
—
A test is something someone does to see if something works.
The person did a good test of the machine by pushing all the buttons and watching the machine.
test
Verb
—
The action of testing; to try something out to see whether it works.
He tested the software many times.