The industry's frailty has made investors increasingly jittery, with some airline stocks shedding as much as 65 percent of their value this week.

Anxious about deer hunting out of season, John grows increasingly jittery as he trails the wounded animal into an abandoned quarry.

As the firms have expanded, partners are increasingly jittery about having their personal net worth on the line every time a client's business stumbles.

Investors worry about Ecuador's consistently troubled economy and its traditional political instability, with some increasingly jittery about the possibility that a left-leaning candidate will win next month's presidential election.

Pessimistic economists, emboldened by yesterday's weaker-than-expected numbers, argue that debt-laden and increasingly jittery consumers will be unable to make up for a fall-off of corporate investment.

As the Huntsman girls' tweets have become more popular, their father's campaign workers have become increasingly jittery.

With investors increasingly jittery about G.M.'s weak auto sales and bleak outlook, its precarious debt ratings are also weighing on bond markets.

As the global market panic gained force in recent days, foreign investors became increasingly jittery about Latin America.

Parnevik, who shot a brilliant 66 today to take a two-stroke lead over the increasingly jittery Clarke, does not number himself among the intimidated.

For the past year she had been making him increasingly jittery whenever they were together.