persevere   ▶ gukomeza, gushīshikara, gushimika
En-En dictionary 
gushīshikara (-shīshikaye)     v   ▶ 1. to strive, 2. persist, persevere
gukomeza (-komeje)     v   ▶ 1. to continue, to proceed, 2. make strong, 3. to persevere, to sustain, 4. to confirm
gushimika (-shimitse)   v   ▶ 1. to do one's duty, 2. to persist, to persevere, 3. to hold strongly