研とぎ師し
Meanings
Noun
1. knife grinder (person); sword sharpener; polisher (of mirrors, swords, etc.)
Kanji used
refine
mentor
Pitch accent
と
ぎ
し
Composed of
polish; grinding; sharpening
teacher; master; religious leader; specialist; five-battalion brigade comprising 2500 men (Zhou dynasty Chinese army)