RAR

n. most efficient method for compressing computer files; computer files that was compressed using the program RAR

In computing, RAR is a proprietary file format for data compression and archiving, developed by Eugene Roshal (hence the name RAR: Roshal ARchive).The file extension is .rar. The MIME-Type is application/x-rar-compressed.
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adj. rare, uncommon, unusual; thinly distributed; scarce, not abundant

nice, dear

rare
(puţin) = scarce
pl. (puţini) = scarce
pl. (puţini) = few
(neobişnuit) = unusual
fig. rare
fig. uncommon
fig. exceptional
(neîntrecut) = matchless
(a vorbi etc.) = slowly
v. rareoripiatră rară = gem