roast (v.)

late 13c., "to cook by dry heat," from Old French rostir "to roast, burn" (Modern French rôtir), from Frankish *hraustjan (cognate with Old High German rosten, German rösten, Middle Dutch roosten "to roast"), originally "cook on a grate or gridiron," related to Germanic words meaning "gridiron, grate;" such as German Rost, Middle Dutch roost.

Intransitive sense "be very hot, be exposed to great heat" is from c. 1300. The meaning "make fun of in an affectionate way" is from 1710. From the same source as roster. Related: Roasted; roasting. Roast beef is first recorded 1630s; French rosbif is from English.

Bifteck and rosbif, words that have come into French after the invasions of 1814 and 1815, are only imitations of the English way of pronouncing "beef-steak" and "roast beef," the French not recognizing their word rôti, formerly rosti, in the English sounds of "roast" nor bœuf, in that of "beef," which in Norman-French was written bœf and buef, and probably pronounced somewhat like the present English. [Jean Roemer, "Origins of the English People and of the English Language," London, 1888]

roast (n.)

early 14c., "meat roasted or for roasting;" see roast (v.). Meaning "a roasting" is from 1580s. Sense of "an unmerciful bantering" is from 1740.

Others are reading

Definitions of roast from WordNet
roast (v.)
cook with dry heat, usually in an oven;
roast the turkey
roast (v.)
subject to laughter or ridicule;
His former students roasted the professor at his 60th birthday
Synonyms: ridicule / guy / blackguard / laugh at / jest at / rib / / poke fun
roast (n.)
a piece of meat roasted or for roasting and of a size for slicing into more than one portion;
Synonyms: joint
roast (n.)
negative criticism;
Synonyms: knock
roast (adj.)
(meat) cooked by dry heat in an oven;
Synonyms: roasted