This is the 3134th most frequent Catalan word.
plantar
To plant or to place firmly.
In this sentence, 'plantar' is used in its literal sense, meaning to physically plant something such as a tree or a seed in the ground.
Vaig plantar un arbre al jardí.
I planted a tree in the garden.
Here, 'plantar' is used idiomatically in the phrase 'plantar cara', which means to confront or 'face up' to a situation or challenge.
Va decidir plantar cara al problema i solucionar-lo.
He decided to face the problem and solve it.
In this context, 'plantar' is colloquial, implying abandoning or skipping a scheduled meeting or appointment, creating the sense of leaving someone waiting.