English boulder

← Middle English bulder (inherited)

← Dutch bolder (derived)

← Dutch bol (mention)

← Swedish bullersten (borrowed)

← Swedish buller (mention)

← Swedish sten (mention)

→ English rock (link)

→ English boulderer (suffix)

→ English boulderlike (suffix)

→ English boulderstone (compound)

→ English bouldery (suffix)

→ English boulderless (suffix)

→ English bebouldered (confix)

→ Portuguese roca (link)