Comparative form of the adjective 'spruce', meaning more neat and tidy in appearance.
The word 'sprucier' makes people think of someone who looks very neat and clean.
Examples:
He looks sprucier than his brother.
Her room is sprucier than mine.
The sprucier the better, I always say.
I wish I could be sprucier, but I'm always making a mess.
His outfit is sprucier than a penguin in a tuxedo.
I want my hair to be sprucier, like a movie star's.