maintain    kugumya, kugumiriza
(one's position, argue and swear that you're right) gutara
En-En dictionary 
kugumiriza (-gumirije)     v    1. to hold fast to, 2. continue, 3. to maintain
service    (to repair, maintain) gukanika
En-En dictionary 
kugumya (-gumije)     v    1. to maintain, 2. to keep, 3. make firm, hold in place, 4. cause to stay