noun
bulletproof; protection against bullets
Refers to something that stops bullets, or a charm believed to protect against bullets. Often used in historical or fictional contexts.
侍は弾除けのお守りを身につけていた。
The samurai wore a charm for protection against bullets.
この盾は弾除けになる。
This shield is bulletproof.
防弾 is the modern technical term for 'bulletproof', while 弾除け has a more traditional or folkloric nuance.
Compound of 弾 (tama, 'bullet') and 除け (yoke, 'avoiding, warding off').