Any language, explain what it means if it’s not English.
For example (as a non-native speaker) I’ve always liked the English word ‘unprecedented’, mostly in the context of fiction. Especially if it paints some entity to be really mystical or wondrous or it’s own never before seen order of magnitude in any way.
Anesthetize
The ‘esth’ right into a t is just about the coolest combination of word sounds in any word in English.
Second favorite is cwm. :)
As someone with a lisp who tends to turn ‘s’ and ‘z’ sounds into a ‘th’ sound, i will respectfully disagree that it is a cool combination. it hurts me a little that i can’t always say words properly but i suppose i could always ask a doctor to aneththetithe me.