Gain a thorough knowledge of synonyms

What is another word for Gain a thorough knowledge of?

• master
• get up on
• get down cold
• get up in
• become familiar with
• make oneself master of
• gain command of
• get down pat
• become adept in
• become versed in
• learn all about
• gain a good knowledge of
• get hep
• become conversant with
• become well-versed in
• get up on one's stuff