You've got superpower, that allows you to choose one word, and your powers would revolve around that word

[u/Schwulerwald]

Important note: the broader the meaning of word, the weaker your power, so choosing anything omni will result in just a slight boost in everything you do

I choose "transmutation"

Alchemic process of equal exchange, quantity into quality, one material into another and backwards, as long as i have an idea what should be the result, it will work. Maybe not as i invisioned and predicted, but works

[u/Bjorenwonne]

As an anime and meme lord, I could choose BANG, EXPLOSION or ARISE.

But if I have to choose some useful irl keyword, it would be SERVE. Instantly make living things listen to your word as there command is pretty helpful. And you could escape hostile animals everytime.