querulent

quer·u·lent

(kwer'ŭ-lĕnt), Denoting one who is ever suspicious, always opposing any suggestion, complaining of ill treatment and of being slighted or misunderstood, easily enraged, and dissatisfied; characteristic of paranoid personalities. [L. querulus, complaining, fr. queror, to complain]

querulent

(kwĕr′ū-lĕnt) [L. querulus, complaining] 1. Complaining; fretful.2. One who is dissatisfied, complaining, and suspicious.