: difficult in a way that is usually interesting or enjoyable. Thesaurus: All synonyms and antonyms for challenging Nglish: Translation of challenging for Spanish speakers Britannica English: Translation of challenging for Arabic speakers.
To illustrate the tremendous indirect impact of emerging zoonotic diseases on public health policy and structures and on public perception of health risks, the authors provide a number of examples, including that of the Ebola virus, avian influenza, monkeypox and bovine spongiform encephalopathy.
verb (used without object), emerged, emerging. 1. to come forth into view or notice, as from concealment or obscurity: a ghost emerging from the grave; a ship emerging from the fog. 2. to rise or come forth from or as if from water or other liquid. 3. to come up or arise, as a question or difficulty.