trustworthy    (person) umwīzigirwa, umunyakuri
(to be) kwīzigirwa
En-En dictionary 
umwīzigirwa (ab-)     1  class 1
singular: umu-
plural: aba-
  
trustworthy or faithful person
kwīzigirwa (-īzigiwe)     v    to be trusted, to be trustworthy
igihūmbu (ibi-)     4  class 4
singular: iki-,ic-
plural: ibi-,ivy-
  
1. illegitimate child, 2. dishonest person, 3. untrustworthy, unwise, 4. one who won't stay home, vagabond, gadabout
untrustworthy    (person) igihūmbu
En-En dictionary