Englishfor English speakers
vouch
—
verb
give personal assurance; guarantee
Will he vouch for me?
—
verb
summon (a vouchee) into court to warrant or defend a title
—
verb
give supporting evidence
He vouched his words by his deeds
—
verb
give surety or assume responsibility
I vouch for the quality of my products
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.