Where does “gangplank” come from?

I can't write this etymology because the chain provided contains only English entries repeating in a circular pattern, with no actual etymological progression to older languages or roots. A valid etymology requires movement through actual source languages (such as Old English, Proto-Germanic, Proto-Indo-European, etc.), not circular repetition within the same language and form.

gangplank (English): A board used as a temporary footbridge between a...

Definitions

  1. A board used as a temporary footbridge between a...

Ancestry of “gangplank”, step by step

gangplank traces back through two separate lines of ancestry.

via English plank

StepLanguageWordMeaning
1EnglishplankA long, broad and thick piece of timber, as...
2Germanplankeplank big or thick board of wood
3Middle Low Germanplanke
4Old FrenchplankeAlternative form of planche
5Vulgar Latinplanca
6Latinpalancaslat, plank or stake; palanka, a palisaded...
7Ottoman Turkishپلانقهa kind of palisaded fortification erected by the...
8Italianparancohoist
9ItalianpalancoAlternative form of paranco
10Vulgar Latinpalancaslat, plank or stake; palanka, a palisaded...
11Latinphalangawooden roller; carrying pole; alternative form of...
12Ancient Greekφάλαγξline of battle, battle-array; ranks of an army;...
13Proto-Indo-Europeanbʰelǵ-to balk, beam

via English gang

StepLanguageWordMeaning
1EnglishgangTo go; walk; proceed; A number going in company;...
2Middle Englishganggoing
3Old Englishganggoing, walking; path; gait
4Proto-Germanic*gang
5Proto-Germanicgangazpace, step, gait; walk; way, course
6Proto-Indo-Europeanǵʰongʰ-o-s
7Proto-Indo-Europeanǵʰengʰ-to walk; to step
Every word from Proto-Indo-European bʰelǵ-Every word from Ancient Greek φάλαγξEvery word from Latin phalanga