inertia in czech inertia in german inertia in danish inertia in spanish inertia in italian inertia in norwegian inertia in russian inertia in swedish inertia in bulgarian inertia in belarusian inertia in estonian inertia in finnish inertia in ukrainian inertia in polish inertia in hungarian inertia in portuguese inertia in croatian inertia in lithuanian inertia in slovak