Complex sentence: Its stem is used as a condiment and has an extremely strong pungency more akin hot mustard than the capsaicin in a chili pepper, producing vapours that stimulate the nasal passages more than the tongue.
Split into simpler sentences: Its stem is used as a condiment and has an extremely strong pungency. Its hotness is more akin to that of a hot mustard than that of the capsaicin in a chili pepper, producing vapours that stimulate the nasal passages more than the tongue.