Indeclinables.
Nequam, lit. ‘nohow,’ is an Adjective in the colloquial Latin of Plautus' time, e.g.- Pers. 453 “si malus aut nequamst, male res vortunt quas agit; sin autem frugist, eveniunt frugaliter”;
- Truc. 157 “postremo illi sunt improbi, vos nequam et gloriosae.”
- Truc. 34 “temptat benignusne an bonae frugi sies” (cf. 41),
- Cas. 268 “ut enim frugi servo detur potius quam servo improbo”,
- Pers. 454 (just quoted) “sin autem frugist, eveniunt frugaliter.”

