Learn how to say Upskilling correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word upskill:
teach (an employee) additional skills:
this is an opportunity to upskill staff and expand their capabilities
(as noun upskilling)
the upskilling of the labour force
[no object] (of an employee) learn additional skills:
they will provide grants of up to 75% for staff who decide to upskill