刀圭 is read as とうけい (toukei) and means doctor.
とうけい
toukei
とうけいか
doctor
とう
knife money (knife-shaped commodity money used in ancient China)
とうけん
sword
かたなのてまえ
samurai's face
とじ
lady
とうし
small knife that is largely ornamental or used to cut open letters and the like
とうか
under the sword
かたなもち
swordbearer
とうこう
swordsmith
かたなをうつ
to temper a sword
とうしん
knife blade
たち
straight single-edged Japanese sword (from the mid-Heian period or earlier)