kind of Austrian pastry, 1893, from German Strudel, literally "eddy, whirlpool," from Old High German stredan "to bubble, boil, whirl, eddy," from PIE verbal stem *ser- "to flow" (see serum).

c. 1600, "blister or swelling," imitative. Also used for "bubble" (1640s), "protuberance on a cell surface" (1962). Compare blob. "In relation to blob, bleb expresses a smaller swelling" [OED].

"to spring, rise, gush," Old English wiellan (Anglian wællan), causative of weallan "to boil, bubble up, rise (in reference to a river)" (class VII strong verb; past tense weoll, past participle weallen), from Proto-Germanic *wellanan "to roll" (source also of Old Saxon wallan, Old Norse vella, Old Frisian walla, Old High German wallan, German wallen, Gothic wulan "to bubble, boil"), from PIE root *wel- (3) "to turn, revolve," on notion of "roiling or bubbling water."

"metal container to hold live coals," 1680s, from French brasier "pan of hot coals," from Old French brasier, from brese "embers," ultimately from West Germanic *brasa (compare braze (v.1)), from PIE root *bhreu- "to boil, bubble, effervesce, burn."

1590s, "burning, glowing, hot," from Latin fervidus "glowing, burning; vehement, fervid," from fervere "to boil, glow" (from PIE root *bhreu- "to boil, bubble, effervesce, burn"). Figurative sense of "impassioned" is from 1650s. Related: Fervidly; fervidness.

type of ornament worn by the ancient Romans, especially a protective amulet worn around the neck by children, 1876, from Latin bulla (plural bullae) "round swelling, knob," literally "bubble" (see bull (n.2)).

1590s, "boiling," from Latin ebullientem (nominative ebulliens), present participle of ebullire "to boil over," literally or figuratively, from ex "out, out of" (see ex-) + bullire "to bubble" (see boil (v.)). Figurative sense of "enthusiastic" is first recorded 1660s.

1702, from Latin effervescere "to boil up, boil over," from assimilated form of ex "out" (see ex-) + fervescere "begin to boil," from fervere "be hot, boil" (from PIE root *bhreu- "to boil, bubble, effervesce, burn"). Related: Effervesced; effervescing.

Old English beorma "yeast, leaven," also "head of a beer," from Proto-Germanic *bhermen- "yeast" (source also of Dutch berm, Middle Low German barm), from suffixed form of PIE root *bhreu- "to boil, bubble, effervesce, burn."

mid-14c., "warmth or glow of feeling," from Old French fervor "heat; enthusiasm, ardor, passion" (12c., Modern French ferveur), from Latin fervor "a boiling, violent heat; passion, ardor, fury," from fervere "to boil; be hot" (from PIE root *bhreu- "to boil, bubble, effervesce, burn").