To teach someone additional skills, especially as an alternative to redundancy(verb)
To acquire such additional skills(verb)
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Use "upskill" in a sentence
"Government schemes to "upskill" and "retrain" reach relatively few of the unemployed and, in any case, may miss the importance of being left out of important networks as a key issue for the long-term unemployed."
"We need to build a sectoral social dialogue so people can be consulted as regards restructuring, secondly the transition should be made with proper training and social protection as workers 'upskill'."
"They have to upskill themselves by focusing better."