accumulate
to increase something such as a rent or price, especially by an amount that is considered to be too much: （尤指过分地）增加，提高（房租、价格等）
Our landlord racked up the rent by 15 percent this year.我们的房东今年把房租猛涨了15%。

SMART Vocabulary: related words and phrases

Increasing and intensifying
accretion
accumulate
accumulative
accumulatively
add fuel to the fireidiom
blaze
fade
go into orbitidiom
go up
growing
growingly
heighten
inflation
mushroom
ratchet something up/down
re-escalate
re-escalation
reach a crescendo
redouble
stake

You can also find related words, phrases, and synonyms in the topics:

Price increases

rack up something | American Dictionary

rack up something

phrasal verb with rackverb[ T ]us/ræk/
infml
to obtain or achieve something, or to score goals or points:
The airline was racking up losses of $1.5 million a day.
Miller racked up 28 points in the first half, and kept racking them up in the second.

rack sth up | Business English

rack sth up

phrasal verb with rackverb[ T ]uk /ræk/us
to gradually gain a large amount of something:
The government and debt counsellors believe it is too easy to rack up large numbers of loans.
The company's dozen vehicles rack up 144,000 miles a year.
He'll rack up $10,000 in bonus money.
rack sth up into sthTry to rack these small returns up into modest but consistently positive returns.