I'm struggling hard to remember a word I came across many months ago. It's not an uncommon word as far as I can remember. The word in question means, again if I can recall correctly, to bend something inwards. I think it's a synonym of, or at least related to, telescope (as in The cars telescoped during the collision). I also have a vague remembrance that the word starts with the letter 's'. I've been cudgeling my brains hard over this, but the word is still eluding me.
I know this is probably not the right place to be asking such a frivolous question, but I'm pretty sure I'll be rid in no time of this compulsive obsession to recall the word ASAP.