Niminy-piminy

[nim-uh-nee-pim-uh-nee] /ˈnɪm ə niˈpɪm ə ni/

adjective
1.
affectedly delicate or refined; mincing; effeminate:
A niminy-piminy shyness makes frankness impossible.
/ˈnɪmɪnɪˈpɪmɪnɪ/
adjective
1.
excessively refined; prim

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Nimitz
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Nimonic alloy
/nɪˈmɒnɪk/ noun 1. any of various nickel-based alloys used at high temperatures, as in gas turbine blades
Nimps
/nɪmps/ adjective 1. (Northern English, dialect) easy

Nimr
National Institute for Medical Research
Nimrah
pure, a city on the east of Jordan (Num. 32:3); probably the same as Beth-nimrah (Josh. 13:27). It has been identified with the Nahr Nimrin, at one of the fords of Jordan, not far from Jericho.