Every Effort, Best Effort, Full Power
noun, の adjective
When you put all your power into something, you're putting your full effort into it. Hopefully that's what you put into your kanji learning as well!
This is a jukugo word, which usually means on'yomi readings from the kanji. Since 力 has two on'yomi readings, here's a mnemonic to help you remember which one to use:
With your full effort, you were able to produce a Zen lock (ぜんりょく). It's a lock imbued with the power of Zen, meaning no one and nothing could possibly break it. It's the one lock to rule them all.
I ran to the company with my utmost effort.
The teacher told me, "You haven't used your best effort yet."
If I try to go to the pantry, please stop me with your full power.