唆
サ, そそ.る, そそのか.す
tempt, seduce, instigate, promote
JLPT1 G7 S10 F1278
口
mouth +
夋
# as described in
俊
for the sound alone to simulate a whisper → *incite*, *tempt* or *coax* (in a whispered voice).
[Full Kanji Etymology List]