油然而生

Explanation: Naturally produced (some thoughts and feelings.) 　　Usage: Partial official; as the predicate attribute; represents the thinking of other 　　Source: Su Xun Song, "Genealogy quoted" I view the spectrum who Xiaodi the heart can spontaneously carry on. " 　　Riddle: Candlelight; wax torch ashes; sulfur dioxide Thesaurus:  be dissolved in [into] tears, cannot help laughing, be unable to stifle a laugh; can’ t help laughing, Renjunbuzhu, let loose a banquet of brine, tears and mucus flowing down rapidly, naturally, quiet or partly suppressed laugh Antonym Group:  forced laughter, find happiness in suffering