sit onsb
—phrasal verbwithsitverbuk/sɪt/us/sɪt/present participlesitting|past tense and past participlesat
informaltoforcesomeone to besilentor not to do something
管制（某人），压制（某人）
Thebossis going tositon him to makesurehe says nothing.老板要向他施压，确保他保持沉默。