{ , n. The quality of state of being proficient; advance in the acquisition of any art, science, or knowledge; progression in knowledge; improvement; adeptness; as, to acquire proficiency in music. [ 1913 Webster ]
[いんか, inka](n, vs) (1) { Buddh } dharma transmission (formal confirmation of a student's awakening by his master); (2) certificate of proficiency (in flower arrangement, etc.)[Add to Longdo]