よし

よし is an interjection used to psych oneself up or signal determination before taking action. It translates roughly as "alright!" or "okay, here I go!"

USAGE:
Typically said when steeling oneself to do something or after making a decision. It is distinct from いい/よい (good) — here it functions purely as an exclamation, not an adjective.

VARIATIONS:

• よっし: slightly more emphatic
• よっしゃ: excited or triumphant; often used after a success ("Yes!")
• よーし: drawn out for dramatic emphasis

COMMON PATTERNS:

• よし、行(い)こう！: Alright, let's go!
• よし、決(き)めた！: Okay, I've decided!
• よし、やるぞ！: Right, let's do this!

REGISTER:
Informal. Mostly used in spoken language and internal monologue. Sounds masculine in some contexts, though all genders use it. Not appropriate in formal settings.