blood-clotting

The compound 'blood-clotting' is a transparent Modern English formation that directly describes a physiological process. The first element, 'blood', has a stable history from its Proto-Germanic root blōþam, maintaining its core meaning. The second element derives from 'clot', a word of probable Germanic origin imitative of a lump or mass. The combination 'clotting' describes the action of becoming clotted. Thus, the term's logic is entirely literal: it names the process ('-clotting') specific to the substance 'blood', evolving from simple descriptive components into a precise medical and biological term.

Structure: blood (fluid) + clotting (forming lumps) - blood: From Old English 'blōd', of Germanic origin; related to German 'Blut'. The noun referring to the red fluid circulating in the body. - clotting: From the verb 'clot', of Germanic origin (related to Dutch 'klont'), plus the suffix '-ing' which forms the present participle or a gerund/verbal noun. 'Clot' means to form or cause to form into a thick, semi-solid mass.