diagnostilise

Diagnostilise is a verb used to describe the act of diagnosing or performing a diagnostic assessment. It is an anglicized coinage formed from the noun diagnostic plus the common English verb-ending suffix -ise, and, where attested, appears as a variant of diagnose in varieties of English that prefer -ise spellings (similar to realise or utilise). The term is not widely standardized and is far less common than diagnose or diagnosticate in medical and technical writing.

Usage and domains: In medicine, diagnostilise may appear in informal discussion or in contexts influenced by Commonwealth English; in information technology and systems engineering, it can denote a systematic process of fault-finding and analysis applied to software, hardware, or processes. In formal peer-reviewed writing, authors typically use diagnose, diagnose as, or diagnosticate.

Etymology and semantics: The word derives from diagnostic, with the -ise suffix forming a verb analogous to other -ise verbs in British English. Semantically, to diagnostilise means to determine the nature or cause of a problem by evaluating evidence, symptoms, or data, and to reach a diagnosis. The process can include history-taking, examination, testing, and analytical reasoning, and it may be applied in clinical, laboratory, or technical contexts. See also: diagnosis, diagnostic reasoning, differential diagnosis.