This is the 2782nd most frequent Japanese word.
辛く
"辛く" means "spicy" or "painful," depending on the context.
In this sentence, '辛くて' modifies the noun describing the dish to indicate that it is spicy.
この料理はとても辛くて、美味しいです。
This dish is very spicy and delicious.
Here, '辛くなりました' describes the condition of the throat as becoming sore or uncomfortable, showing a shift in state.
風邪をひいて喉が辛くなりました。
I caught a cold and my throat started feeling sore.
In this case, '辛くて' conveys the emotional or physical difficulty of the work, showing the nuance of hardship.