識
シキ, し.る, しる.す, さと, さとる
discriminating, know, write
JLPT3 G5 S19 F496
As per 戠# as described in 織 (marker) + 言 words → obtain *knowledge* by marking another person's words → (power of) *discrimination* → *acquaintance*. *Write down/record*, *sign* and *banner* are borrowed meanings.
[Full Kanji Etymology List]