This is the 760th most frequent Portuguese word.
solar
"Solar" in Portuguese means "solar" (related to the sun) or can refer to a "manor" or "ancestral home," depending on context.
Here, 'solar' is an adjective describing the energy as being related to the sun.
A energia solar é uma fonte renovável.
Solar energy is a renewable source.
In this sentence, 'solar' functions as an adjective indicating that the clock uses sunlight as its basis.
O relógio solar é um instrumento antigo.
The sundial is an ancient instrument.
Here, 'solar' describes the rays as originating from the sun.