S&S🐘💭 = sati & sampajānoSee definition for sati 7🐘.
Sati in isolation (without sampajāno) occasionally just means the pre-buddhist remembering faculty SN 48.9.
But most of the time, Sati in isolation (without sampajāno) is intended to slurp in S&S🐘💭, 4sp🐘, or even 7sb☀️.
Sati with Sampajāno is an explicit declaration that the specialized Buddhist meaning of 4sp🐘 is intended.
sampajāno = lucid-discerningin verb form: pajānāti (he discerns). See SN 54.1, MN 10, 3⚡💭.
Frequently occurs in the phrase S&S🐘💭 sati & sampajāno.
Sampajāno is what Dhamma-vicaya 2💭🕵️ (Dharma investigation) does in the 7sb☀️ awakening factors.
Sampajāno is equivalent and/or closely associated with pañña/discernment 5👁, vimāmsa/discrimination of 4ip 🌕⚡, right view 1👁, vipassana/insight (see SN 46.3).