"μαθαίνω" basically means "I learn"
"μαθαίνω κάτι σε κάποιον" means "I teach something to someone".
Examples:
Μαθαίνω να οδηγώ, για να πάρω δίπλωμα οδήγησης. = I am learning to drive, to get my driver's license.
Ο πατέρας μου μου έμαθε να οδηγώ. = My father taught me how to drive.
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Vasiliki Baskou, Instructor/Director, https://learn-greek-online.com.