IPA: /ˈθrɪftiɪst/
KK: /ˈθrɪftiɪst/
The most careful and wise in using money or resources, often saving or avoiding waste.
She is the thriftiest shopper, always finding the best deals and discounts.
Comparative: thriftier
Superlative: thriftiest
Thriftiest → It is formed from "thrift" (from Old Norse *þrifa*, meaning to grasp or seize) and the superlative suffix "-iest" (meaning most). The word "thriftiest" means the most economical or careful in the use of resources, as if one is seizing opportunities to save.
Think of 'thrift' as seizing opportunities to save money, and remember that 'thriftiest' means being the most careful with resources.
No commonly confused words.