SOLID LIQUID _etymology

solid 
free from empty spaces XIV; of three dimensions XV; of dense consistency; firm and substantial XVI. — (O)F. solide or L. solidus, rel. to salvus SAFE, sollus whole.

Also sb. XV. So solidarity XIX. — F. solidarité. solidity XVI.

late 14c., from O.Fr. solide "firm, dense, compact," from L. solidus "firm, whole, entire" (related to salvus "safe"), from PIE base*sol- "whole" (cf. Gk. holos "whole," L. salus "health;" see safe (adj.)). Slang sense of "wonderful, remarkable" first attested 1920 among jazz musicians. The noun is recorded from late 15c. Solid South in U.S. political history is attested from 1858. Solid stateas a term in physics is recorded from 1953; meaning "employing transistors (as opposed to vacuum tubes)" is from 1959.

liquid
adj. neither solid nor gaseous XIV; (of air, sound, light) pure, clear XVI. — L. liquidus, f. liquēre (cf. LIQUOR).
Hence sb. (in phon.) XVI; liquid substance XVIII. So liquidate †make clear, set out clearly XVI; clear off (a debt) XVIII; set out the liabilities of XIX; (after Russ. likvidírovat) wipe out XX. f. pp. stem of medL. liquidāre. liquidation XVI. liquor liquid substance. XIII. ME. lic(o)ur — OF. lic(o)ur (mod. liqueur) — L. liquor, -ōr-, rel. to liquāre liquefy, liquēre be fluid. liqueur in its specific sense was adopted from F. in XVIII

late 14c., from O.Fr. liquide, from L. liquidus "fluid, liquid, moist," from liquere "be fluid," related to liqui "to melt, flow." Of sounds, from 1630s. Financial sense of "capable of being converted to cash" is first recorded 1818. The noun is 1709, from the adjective.


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