OpenB@Chin-PalmBack-OpenB@CenterChesthigh-PalmUp OpenB@Palm-PalmUp-OpenB@CenterChesthigh-PalmUp

Etymology
(Alternative #1) Rewarding for speaking correctly hence the gesture for "You speak correctly, good!"

(Alternative #2) A gesture for warm air out of mouth which indicate that it's "good".

(Alternative #3) Affordable to buy food. Mouth for food to eat, hand downward for a gesture of holding a bag of money.

Look at each international sign language for the transformation of a word "Good".

French: "Bon" - http://media.spreadthesign.com/video/mp4/10/14618.mp4

Spanish: "bueno" - http://media.spreadthesign.com/video/mp4/5/14611.mp4

Ukrainian: "добро" - http://media.spreadthesign.com/video/mp4/31/110480.mp4

Polish: "dobry" - http://media.spreadthesign.com/video/mp4/19/59015.mp4

Production

 * Hold the dominant hand briefly in this posture. Hold the nondominant hand in this posture for the duration of the sign.
 * Move the dominant hand downward to contact the nondominant palm in the next posture.
 * Hold the dominant hand briefly in this posture. Hold the nondominant hand in this posture for the duration of the sign.
 * Move the dominant hand downward to contact the nondominant palm in the next posture.

Adjective

 * 1) good
 * 1@CenterChesthigh@FingerForward B@Chin-PalmBack-B@CenterChesthigh-PalmUp B@Palm-PalmUp-B@CenterChesthigh-PalmUp FlatC@Forehead-FingerAcross FlatO@Forehead-FingerAcross
 * PRO GOOD BOY. (“He is a good boy.”)

Adverb

 * 1) well