different between gullish vs bullish

English

gull +? -ish

gullish (comparative more gullish, superlative most gullish)

(archaic) Foolish, credulous, simple-minded.
- , New York, 2001, p.115:
  besides this inbred neglect of liberal sciences and all arts, which should excolere mentem, polish the mind, they have most part some gullish humour or other, by which they are led […].

bull +? -ish

bullish (comparative more bullish, superlative most bullish)

Having a muscular physique
Aggressively self-confident or assertive; bullheaded
He was heavily criticised for his bullish behaviour.
(stock market, of the price of financial instruments) Characterized by rising value.
Optimistic; overly or foolishly optimistic or hopeful

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