[まちがい, machigai](n) (1) (See ミス・1) mistake; error; blunder; (2) accident; mishap; trouble; (3) improper conduct (e.g. between man and woman); indiscretion; (P)#559[Add to Longdo]
[まちがいない, machigainai](exp, adj-i) (1) (See 紛れもない・まぎれもない) certain; sure; doubtless; (exp) (2) (id) I have no doubt; You can depend on it; It's a safe bet; (P)[Add to Longdo]