This neologism arose from a conversation on Google+ in 2018 discussing various options for “put, place, set” in (Neo) Elvish. This verb (and its Quenya equivalent) was proposed for “set” as a causative verb formation based on the root √SED, so more literally “to make rest (on)”. It is used when placing an item on a more or less horizontal surface without any special attachments, as in i adan sestant i vegil bo hardh “the man set the sword (megil) on a table (sardh)”.

The same Google+ conversation suggested ᴺS. sasta- for the more general sense “put, place”, a causative formation based on √SAT “place”. However, I now find this construction problematic since the verbal sense of √SAT is “apportion”, not “place”. I prefer to use ᴺS. panna- (inspired by G. panta-) to mean “put, place” in Neo-Sindarin.