Englishfor English speakers
used
—
adjective
employed in accomplishing something
the principle of surprise is the most used and misused of all the principles of war
— H.H.Arnold & I.C.Eaker
—
adjective
(= secondhand)
previously used or owned by another
bought a secondhand (or used) car
—
adjective
of persons; taken advantage of
after going out of his way to help his friend get the job he felt not appreciated but used
for
Preposition
—
shows that something belongs to something else, or has a specific function
This cake is for you.
This is a net for catching fish.
—
For is used to show the reason for something
He was angry, for he had never been called such terrible names before.
for
Subordinator
—
For introduces a clause with a subject and a to-infinitive
It's not good for you to be too relaxed.