This is the 57th most frequent Spanish word.
mejor
"Better" or "best."
'Mejor' is used as a comparative adjective meaning 'best', showing that the subject surpasses others in quality.
Este libro es el mejor que he leído.
This book is the best I have read.
Here, 'mejor' is utilized as an adverb to express an improved state or condition.
Me siento mejor después de descansar.
I feel better after resting.
In this sentence, 'mejor' functions as an adverb suggesting a preferred or advisable choice or action.