The character "劲儿" is formed through a structural and phonetic process. It begins with the base character "劲" (jìn), which combines the phonetic hint "巠" (jīng) with the semantic radical "力" (lì, meaning force), to originally convey strength or vigor. To this, the colloquial suffix "儿" (ér) is added, not as a separate syllable in standard Mandarin but as a fused "erhua" (儿化) modification, indicated by the written form. This fusion creates a single-syllable word, "jìnr", where the "儿" visually signals a slight rhotacization and a more informal, nuanced meaning of the original "劲", often implying spirit, energy, or attitude in a spoken context.