gushinyanga (-shinyanze)     v    to grit one's teeth to avoid showing pain
grit    (teeth) gukōmanya, kuzyēgenya
(to avoid showing pain) gushinyanga, gushinyiriza
En-En dictionary 
pain    igisigo, umubabaro, ububabare
(sharp) umusōnga
(to get relief from) kwōroherwa
(to grit one's teeth to avoid showing) gushinyanga, gushinyiriza
(to have) kubabara
(to have severe) kurībwa
(to suffer) gucumukura
(to suffer without complaint) kwīyumānganya
(to take pains with) kwītōndera
En-En dictionary 
teeth    amēnyo (see also tooth)
(grinding of) insya z'amēnyo
(very close together) impatane
(to brush the) kwīnyugunura, kwīyugunyura
(to get the first) kwēra
(to grit) gukomānya, kuzyēgenya
(to grit one's ~ to avoid showing pain) gushinyanga, gushinyiriza
(to notch) guhongora
(to pull) guhongora
En-En dictionary