Thread
The thread radical and thread are the same in looks as well as in meaning.
This is why it's good to make sure you know your radicals.
し
いと
None
You have some thread... what's the first thing you do with it? You take it and put it in your mouth, and start sucking it down like spaghetti. You have decided to eat (いと) the thread.
Think about how it tastes. Think about how it feels in your throat. Let it get caught on your teeth and around your tongue. It's a weird feeling having thread in your mouth, and you want to use that weird feeling to remember you're going to eat it.