1. Godan verb with 'gu' ending, Transitive verb

   to sharpen; to hone; to whet; to grind

   彼女はいつも人に対してやいばをといでいます。

2. to wash (rice)

   esp. 磨ぐ

3. to scour; to polish; to burnish

Also written 磨ぐ【とぐ】togu、砥ぐ【とぐ】togu