'boost the spirits' is a correct and usable phrase in written English.
You can use it when referring to something that helps to make someone feel better or more energetic. For example: "I brought my friend a box of chocolates to boost her spirits after she lost her job."
"Snowmageddon!" The president's appearance was the latest in a series of party events as he tries to boost the spirits of Democrats who are bracing for the midterm elections.
Perhaps, in the context of a sports defeat, the more appropriate word might be morale, because performing well or nobly in defeat can boost the spirits of participants and their fans.
With 75 days remaining in a midterm campaign that will determine whether Republicans will win control of Congress, the White House dispatched the vice president here to boost the spirits of Democrats who are bracing for the prospect of deep losses in House, Senate and governors' races.
She is the one in the Davitch clan to take charge during a crisis -- and there are many crises, both small and large, in their chaotic household -- and she is the one to boost the spirits of family members when they are down.
In a practice that's offensive to basically everyone, Chinese tech companies are hiring female cheerleaders to boost the spirits of their largely male teams.
In a practice that's offensive to basically everyone, Chinese tech companies are hiring female cheerleaders to boost the spirits of their largely male staffs.
Scoring touchdowns has been the Giants' problem, but they spent a week of practice trying to boost the spirit and resolve of Collins and the rest of the offense.
The spectacular explosions boosted the spirits of the Afghans living near the front lines.
That month personal expenditure increased by $10.5 billion, or 0.1%, while personal income increased by $38.4 billion, or 0.3%.Cheaper petrol and energy boosted the spirits of America's consumers.
She has boosted the spirits of the American fashion industry with her unconventional mix of avant-garde newcomers and off-the-rack Talbots, and claimed a Council of Fashion Designers of America style-icon award along the way.
Pitchers and catchers had reported to Arizona for spring training earlier in the week, and a game-day-like sense of anticipation boosted the spirits of fans standing patiently in lines at Wrigley Field.
