upgrading is a form of:

Upgrade



verb
1.
(TRANSITIVE) (to promote to a more skilled job at higher pay, to raise in importance, etc) ធ្វើអោយល្អឡើង, ប្រសើរឡើង
2.
(បច្ចេកទេស) បង្កើនឋានៈ, ដំឡើងយសស័ក្តិ, ធ្វើអោយប្រសើរឡើង