| A | B |
|---|
| a cappella | without musical accompanyment |
| aria | a vocal piece sung by a single voice |
| cadence | the rhythmic flow or beat of poetry, etc |
| crescendo | increase in volume or intensity of sound |
| dissonance | a disagreeable combination of sounds |
| libretto | text of a musical work like an opera |
| motif | a repeated signifigant phrase |
| octave | the musical interval of eight full tones |
| sonata | an instrumental musical composition |
| staccato | disconnected, cut short |
| accountable | responsible |
| commitment | being emotionally bound to something |
| default | failure to perform a task |
| feckless | careless |
| incumbent | an obligation |
| liability | being legally responsible |
| mandatory | required |
| negligence | neglect |
| onerous | troublesome |
| remiss | slacking |
