γέλως ἄκαιρος κλαυμάτων παραίτιος → ill-timed laughter causes tears (Menander)
nătātus: ūs, m. id.,I a swimming (postAug.), Stat. S. 1, 5, 25: piscium natatu, Pall. 1, 17, 2: fluvios natatu scindere, Claud. IV. Cons. Hon. 347; cf. id. Rapt. Pros. 3, 333.