This is the 403rd most frequent Catalan word.
llarga
"Llarga" means "long" in English.
In this sentence, 'llarga' is used as an adjective to describe the noun 'carretera' (road) by indicating its length.
La carretera és molt llarga.
The road is very long.
Here, 'llarga' functions as an adjective describing 'cabellera' (hair) regarding its physical characteristic of length.
Ella té una cabellera llarga i bonica.
She has long and beautiful hair.
In this case, 'llarga' is used metaphorically as an adjective to describe the noun 'espera' (wait) in terms of perceived duration.