lay a hand on = hit someone
If you ever try to lay a hand on me, I’ll hurt you.
Never lay a hand on a child.
lay off / (be or get) laid off = to lose a job because business is slow.
Even though he was a good worker, he was laid off because the company wasn’t doing very well. (passive voice)
lend a hand = help
When Tom couldn’t fix the printing press, he asked Jose to lend him a hand.
"Could you lend me a hand with this?"
let (one) off = to allow to go without a consequence
The police officer pulled me over for speeding, but then he let me off without a ticket.
let up / let up on = to stop or begin to stop: VIDEO
look for = try to find; search
The pirates spent two years looking for treasure and finally they found it.
look forward to = to have a good feeling about a future event.
He‘s been looking forward to seeing the new Batman movie for weeks.
look (it) up = to find information
If you need to find a good price on a car, you can look it up on the internet.
You can also look up information in a book.
look through = read; read quickly and with a purpose.
Alicia is looking though the newspaper to find a new job.