early 15c., "beg for, beseech," back-formation from supplication or else from Latin supplicatus, past participle of supplicare "plead humbly, beseech, kneel down." Related: Supplicated; supplicating.
He supplicated the King for clemency
supplicate for permission
supplicate God's blessing
supplement
supplemental
supplementary
suppliant
supplicant
supplicate
supplication
supply
support
supporter
supportive