况且
kuàngqiě · HSK 7
besides
➕ 况 = situation/circumstance + 且 = moreover, and → on top of that, besides
况且 stacks two conjunction parts: 况 (circumstance, as in 情况) plus 且 (and, furthermore). Together they add a further reason: not only that, but besides. Use 况且 to pile on an extra argument that strengthens what you just said.
且 — pictograph of an ancestral tablet or stacked offerings
且 originally depicted an ancestral spirit tablet or a stand holding ritual offerings, and it served as the early form of 祖 (ancestor). Over time it was borrowed to write the unrelated grammatical word meaning 'moreover' or 'and also,' so a new character 祖 was created for the original sense.