1590s, "in want, needy, poverty-stricken," a sense now obsolete, from penury + -ous, or else from Medieval Latin penuriosus, from Latin penuria "penury." The meaning "parsimonious, excessively saving or sparing in the use of money" is attested by 1630s. Related: Penuriously; penuriousness.
Penurious means literally in penury, but always feeling and acting as though one were in poverty, saving beyond reason; the word is rather stronger than parsimonious, and has perhaps rather more reference to the treatment of others. One may be parsimonious or penurious, through habits formed in times of having little, without being really miserly. [Century Dictionary]
1610s, "a pun, a play on words," probably a diminutive of obsolete quib "evasion of a point at issue" (1540s), which is based on Latin quibus? "by what (things)?" Its extensive use in legal writing supposedly gave it the association with trivial argument: "a word of frequent occurrence in legal documents ... hence associated with the 'quirks and quillets' of the law." [OED].
Latin quibus is dative or ablative plural of quid "in what respect? to what extent?; how? why?," neuter of relative pronoun quis (from PIE root *kwo-, stem of relative and interrogative pronouns).
"Islamic monk or friar who has taken a vow of poverty and austerity," 1580s, from Turkish dervish, from Persian darvesh, darvish "beggar, poor," hence "religious mendicant;" equivalent of Arabic faqir (see fakir). The "whirling dervishes" are one order among many. Originally dervis; modern spelling is from mid-19c.
by 1912 in reference to the inertial force that acts on objects that are in motion relative to a rotating reference frame, from the name of French scientist Gaspard Gustave de Coriolis (1792-1843) who described it c. 1835.