American Sign Language: "decline"
/ "deteriorate" / "regress"
This sign means the opposite of "improve."
Think of your non-dominant arm as a "measuring stick." Think of
your dominant hand as showing the
level going down. You can do one big movement to show a major
decline, or you can do smaller movements to show an incremental
worsening of the situation.
DECLINE / deteriorate / regress / go down hill
(A single large movement indicates a substantial worsening of the
situation).
Deteriorate or decline in small stages:
Sample sentence:
If you don't go to sign language class nor chat with Deaf, will your
signing go down hill?
= SUPPOSE YOU NOT GO SIGN CLASS, NOT CHAT DEAF, YOUR SIGN DECLINE?