flatted

Webster's Dictionary (GCIDE)

1.To make flat; to flatten; to level. [1913 Webster]

2.To render dull, insipid, or spiritless; to depress. [1913 Webster]

Passions are allayed, appetites are flatted.— Barrow.[1913 Webster]

3.To depress in tone, as a musical note; especially, to lower in pitch by half a tone. [1913 Webster]