foolproof   (Sound)

The foolproof has 2 Senses.

• foolproof, unfailing
• 確か
• not liable to failure; "a foolproof identification system"; "the unfailing sign of an amateur"; "an unfailing test"
• 失敗に責任がない

• goofproof, goof-proof, foolproof
• proof against human misuse or error; "foolproof this appliance"
• 人間の不正使用または誤りに対する証拠