to be so worried or upset that you don't know what to do
быть так обеспокоенным или расстроенным, что не знаешь, что делать
"I'm at my wits' end trying to calm the kids down."
"Я на грани нервного срыва, пытаясь успокоить детей."
to increase the intensity or amount of something
To be completely truthful or sincere.
to become less hot or less angry
to be honest and trustworthy
to be at the forefront of an action or movement
to finally understand or accept the truth or a new idea