Septentrional means northern or relating to the north. Therefore, antonyms for "more septentrional" would be words that relate to the south. Some possible antonyms include meridional, southerly, southward, and tropical. These words are often used to describe regions or climates that are warmer and sunnier than those found in northern regions. While the north is associated with coldness, darkness, and winter, the south tends to evoke images of warmth, light, and tropics. When traveling, people often seek out the contrast between these two regions, looking for refuge from cold, bleak winters or hot, humid summers.