Where does “heavy bomber” come from?

heavy bomber (English) comes from English bomber, from English bombproof, from English -proof, from English proof, from Middle English proof, from Old French prove, from Latin proba, from Latin probāre — passed , crossed.

heavy bomber (English): A large, long-range bomber, capable of carrying a heavy payload

Definitions

  1. A large, long-range bomber, capable of carrying a heavy payload

Ancestry of “heavy bomber”, step by step

heavy bomber traces back through two separate lines of ancestry.

via English bomber

StepLanguageWordMeaning
1EnglishbomberA military aircraft designed to carry and drop...
2EnglishbombproofSufficiently strong to resist the effects of a...
3English-proofUsed to form adjectives denoting an impervious or...
4EnglishproofAn effort, process, or operation designed to...
5Middle Englishproof
6Old Frenchprove
7Latinprobatest, trial; proof, evidence
8Latinprobāre
9Latinprobōto approve, permit, commend
10LatinProbusgood, serviceable, excellent, superior, able
11Proto-Indo-Europeanpro-bhwo-being in front, prominent
12Proto-Indo-Europeanpro-toward, forward
13Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
14Proto-Indo-Europeanper-before, in front; first; to go through
15Proto-Indo-Europeanpr̥tóspassed , crossed

via English heavy

StepLanguageWordMeaning
1EnglishheavyHaving great weight; Serious, somber; Not easy to...
2EnglishheaveTo lift with difficulty; to raise with some...
3Middle EnglishhevenTo raise, lift, heave; Alternative form of haven
4Old Englishhebbanto lift, raise
5Proto-West Germanichabbjanto have; to lift
6Proto-Germanichabjanąto have, to hold; to lift, heave
7Proto-Indo-Europeankh₂pyé-
8Proto-Indo-Europeankeh₂p-to seize, grab; to seize; take up; lift; to take,...
Every word from Proto-Indo-European pr̥tós