gratis
Gratis (adj) means Given without charge; free. Example: “Drinks were gratis for anyone who signed up early.”
How to use gratis
Learner’s notesIn plain EnglishFor free, with no cost involved.
Slightly formal or old-fashioned compared to just saying "free".
Fill the gap
Can you complete this real example?
Drinks were _____ for anyone who signed up early.
Etymology
Borrowed from Latin grātīs, a shortened form of grātiīs ("out of kindness, for nothing"), from grātus ("pleasing, thankful").