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have heightened

  • present perfect
    of heighten.
    heighten
    verb (used with object)
    to increase the height of; make higher.

Example Sentences

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However, intensifying attacks on vessels in the region have heightened concerns over the safety of transits.

From The Wall Street Journal ● Oct. 8, 2026

Investors have heightened their focus on long-term Treasury yields after their recent climb, partly on concerns that such moves lift borrowing costs for consumers, companies and the U.S. government.

From MarketWatch ● Aug. 22, 2026

Security agencies have heightened surveillance in major urban centres ahead of the protests, with police expected to maintain a heavy presence in Nairobi and strategic installations.

From BBC ● Jun. 25, 2026

The developments in Assam have heightened fears in West Bengal, officials and residents say.

From Barron's ● May 29, 2026

Even the known jeopardy of her husband's position would have heightened the value of her appearance, adding to her popularity the spice of curiosity as well.

From An Ambitious Woman A Novel by Edgar Fawcett