reserved   ▶ (to be) kwīrengagiza, kwīyumānganya
En-En dictionary 
kwīrengagiza (-īrengagije)     v   ▶ 1. to procrastinate, 2. put off doing what one should, 3. to act indifferent, 4. to ignore someone, 5. to not give answer when asked, 6. to not show one's feelings, be reserved
kwīyumānganya (-īyumānganije)     v   ▶ 1. to be reserved, 2. be unwilling to commit oneself, 3. suffer pain without complaint, be stoical, 4. to go or do reluctantly