differential (noun) cog: main part of device
Sinonime: blown away,
delighted,
ecstatic,
elated, exulting, flipping, flushed,
flying, gleeful,
high,
joyful,
joyous,
jubilant,
overjoyed, rejoicing, reveling, transported,
triumphant, turned on, wowed
Antonime: depressed,
discouraged,
sad,
sorrowful,
unhappy