Synonyms for Belittles:

v.

cheapens (verb)
trims, degrades, slashes, reduces, pares, marks down, cuts, debases, depreciates, discounts, devalues, devaluates, deflates, cheapens, diminishes, shaves.
shortens (verb)
abridges, shortens, condenses, lowers, Clips, compacts.
underestimates (verb)
underestimates, undervalues.