οὐ σμικρὸν παραλλάττει οὕτως ἔχον ἢ ἄλλως → it makes no small difference if it's this way, or another way
P. and V. θανάσιμος, ὀλέθριος (Plato but rare P.), V. πολυφθόρος; see also harmful.
of a blow: P. and V. καίριος (Xen.).
strike with a deadly blow: P. θανασίμως τύπτειν (acc.).