accidental

• 形容事情发生得出乎意料、并非有意或计划之中；也可指偶然发生的、非本质的。

Describes something that happens by chance or unintentionally, not planned or deliberate.

1. Happening by chanceB1formal

   Occurring unintentionally or unexpectedly, without planning or deliberate intent.

   偶然的

   • The discovery of penicillin was accidental.
   • He made an accidental error in the calculation.
   • Their meeting was purely accidental.

   同义词casualchancefortuitousinadvertentincidentalrandomunintendedunintentionalunplannedunpremeditated

   反义词calculateddeliberatedesignedintentionalplannedpremeditated

2. Musical accidentalC1formalart

   A symbol in music notation (such as sharp, flat, or natural) that temporarily alters the pitch of a note, outside the key signature.

   变音记号

   • The composer added an accidental to the note in the third measure.
   • Accidentals are used to create chromaticism in the melody.
   • The pianist carefully played the accidental marked in the score.

• 名词，指音乐中临时改变音高的记号，如升号、降号或还原号，用于在调号之外临时变化音符的高度。

A noun referring to a musical symbol, such as a sharp, flat, or natural, that temporarily alters the pitch of a note outside the key signature.

1. Musical accidentalB2formal

   A symbol in musical notation indicating a temporary alteration of a note's pitch, such as a sharp, flat, or natural, that is not part of the key signature.

   临时记号

   • The composer added an accidental to the melody to create a surprising effect.
   • In this piece, every accidental must be played precisely.
   • The pianist missed the accidental and played a wrong note.