thrift

Concise Oxford English Dictionary © 2008 Oxford University Press:
thrift/θrɪft/

▶noun

• 1 the quality of being careful and not wasteful with money and other resources.

• 2 US another term for savings and loan.

• 3 a plant which forms low-growing tufts of slender leaves with rounded pink flower heads, growing chiefly on sea cliffs and mountains. [Armeria maritima.]

– origin ME (in the sense ‘prosperity’): from ON, from thrífa ‘grasp, get hold of’; cf. thrive.