然

Affirmative/committal ("yes," "certainly"); logical transition ("thus," "therefore," "so"); concrete sense of burning or igniting.

Adverbial suffix: attaches to adjectives to denote manner (similar to English "-ly") or a general state of being. Connective: in the compound 然而, it functions as an adversative ("however," "but").

Distinguish between 然 acting as the main predicate ("It is so") and 然 functioning as a modifier describing how a predicate occurs.

The meaning of combustion (to burn) appears in early strata; this sense was largely subsumed by the character 燃 in later classical Chinese. In archaic texts, these two may not yet be strictly differentiated.

In formal, diplomatic, or legal correspondence, an affirmative 然 often carries the weight of a pledge, promise, or formal commitment to a proposition rather than mere agreement with a fact.