（求词源） 三长两短 is a chengyu that means "unforeseen disaster". It can also be a euphemism for death. Here's an example of its usage: 明·罗贯中《三遂平妖传》：“万一些后再有三长两短，终不能靠着太医活命。” What is its etymology ...
爱不释手 be so fond of something that one will not let it out of one's hand So I'm guessing 爱 would be the being fond of something and the 不释手 would be the not letting go. I feel like it's missing ...