toughened russian
ужесточенный
tightened, stricter, toughened, reinforced
закаляемый
hardenable, temperable
being tempered, being toughened, being strengthened
ужесточи́вший
tightened, made stricter, toughened
tightened, stricter, toughened, reinforced
hardenable, temperable
being tempered, being toughened, being strengthened
tightened, made stricter, toughened