TINNIER

Of or pertaining to or resembling tin.

"The object had a tinny appearance."

Pertaining to the thinness and cheapness of tin or similar-looking metals, in contrast to a heavier, more valuable metal.

"The shop was filled with tinny tourist geegaws."

Pertaining to a thin, unpleasant sound recalling that of tin being rapped.

"The piano was not simply out of tune, but had become downright tinny."