Using a programmable thermostat is an economical way to reduce heating bills without sacrificing comfort.
使用可编程恒温器是一种经济的方式，能在不牺牲舒适度的情况下减少取暖费用。
Which choice best defines “economical”?
D — Thrifty and cost-effective; efficient. “economical” means Thrifty and cost-effective; efficient.
Which word means “Thrifty and cost-effective; efficient”?
A — economical. “economical” means Thrifty and cost-effective; efficient.
economical — Thrifty and cost-effective; efficient. In Chinese: 节约的，经济的.
economical is pronounced /ˌiːkəˈnɒmɪkl/.
Using a programmable thermostat is an economical way to reduce heating bills without sacrificing comfort. (使用可编程恒温器是一种经济的方式，能在不牺牲舒适度的情况下减少取暖费用。)
frugal, thrifty, cost-effective — all close in meaning to economical (Thrifty and cost-effective; efficient).
wasteful, extravagant — each the opposite of economical (Thrifty and cost-effective; efficient).
Yes. economical is on the SAT Prep Easy list — mid-frequency academic words that do get tested. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.
economy (frugality) + ical → frugal, economic.