The Tocharian A word kākmart
Word kākmart
Meaning master, sovereign
See also Tocharian A: kākmärtik ‘ruler, master’
Avestan: sāstar- ‘master’

Other words that might be of interest
akri ‘shameless’, āśant ‘leader, charioteer’, ekro ‘poor’, kip ‘shame’, klyom ‘noble’