a. 不和谐的, 不成调子的

[ adj ]
not having a musical sound or pleasing tune
<adj.all>

Tuneless \Tune"less\, a.
1. Without tune; inharmonious; unmusical. `` Thy tuneless
serenade.'' --Cowley.

How often have I led thy sportive choir,
With tuneless pipe, beside the murmuring Loire!
--Goldsmith.

2. Not employed in making music; as, tuneless harps.

3. Not expressed in music or poetry; unsung. [R.]