different between penetrating vs nippy

English

penetrating (comparative more penetrating, superlative most penetrating)

able to pierce or penetrate
The skunk produces a penetrating odor.
demonstrating acute or keen understanding
His novel shows a penetrating insight into the criminal mind.

penetrating

nip +? -y

nippy (comparative nippier, superlative nippiest)

(Britain, informal) fast; speedy
- c. 2000, Melanie Allen, Customer Relations Management (page 6)
  A Rolls Royce will not do if you need an economical, nippy car that is easy to park.
(informal) Of the weather, rather cold.
Inclined to nip; bitey.
- 1995, Nancy Baer, Choosing a Dog: A Guide to Picking the Perfect Breed (page 161)
  Spoiling may create a pushy, nippy dog that lacks confidence.
(Scotland, informal) annoying; irritating
(Scotland) sharp in taste
(Scotland) curt
(Scotland) parsimonious

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