(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium. Particularly: “Onomatopoeic?”)
きゅんきゅんする or キュンキュンする • (kyunkyun suru) suru (stem きゅんきゅんし (kyunkyun shi), past きゅんきゅんした (kyunkyun shita))
| Katsuyōkei ("stem forms") | ||||
|---|---|---|---|---|
| Mizenkei ("imperfective") | きゅんきゅんし | kyunkyun shi | ||
| Ren’yōkei ("continuative") | きゅんきゅんし | kyunkyun shi | ||
| Shūshikei ("terminal") | きゅんきゅんする | kyunkyun suru | ||
| Rentaikei ("attributive") | きゅんきゅんする | kyunkyun suru | ||
| Kateikei ("hypothetical") | きゅんきゅんすれ | kyunkyun sure | ||
| Meireikei ("imperative") | きゅんきゅんせよ¹ きゅんきゅんしろ² |
kyunkyun seyo¹ kyunkyun shiro² | ||
| Key constructions | ||||
| Passive | きゅんきゅんされる | kyunkyun sareru | ||
| Causative | きゅんきゅんさせる きゅんきゅんさす |
kyunkyun saseru kyunkyun sasu | ||
| Potential | きゅんきゅんできる | kyunkyun dekiru | ||
| Volitional | きゅんきゅんしよう | kyunkyun shiyō | ||
| Negative | きゅんきゅんしない | kyunkyun shinai | ||
| Negative continuative | きゅんきゅんせず | kyunkyun sezu | ||
| Formal | きゅんきゅんします | kyunkyun shimasu | ||
| Perfective | きゅんきゅんした | kyunkyun shita | ||
| Conjunctive | きゅんきゅんして | kyunkyun shite | ||
| Hypothetical conditional | きゅんきゅんすれば | kyunkyun sureba | ||
| ¹ Written imperative ² Spoken imperative | ||||