solder

Concise Oxford English Dictionary © 2008 Oxford University Press:
solder /ˈsəʊldə, ˈsɒldə/

▶noun a low-melting alloy, especially one based on lead and tin, used for joining less fusible metals. ▶verb join with solder.

– derivatives
solderable adjective,
solderer noun.

– origin ME: from OFr. soudure, from the verb souder, from L. solidare ‘fasten together’, from solidus ‘solid’.