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challenge ['ʧælɪnʤ] n
gen.	apstrīdēšana
econ.	noraidījums
English thesaurus
challenge ['ʧælɪnʤ] n
law	to make a formal objection to the qualifications of a potential jury or juror; Someone's right to object to or fight something in a legal case
mil., abbr.	chal
mil., logist.	Act of ascertaining the nature of a detected person, object or phenomenon and possibly even their nature or type. (FRA); Any process carried out by one unit or person with the object of ascertaining the friendly or hostile character or identity of another. (FRA)

challenges: 15 phrases in 9 subjects

Environment	1
General	1
Health care	2
Industry	1
Medical	4
Microsoft	3
Procedural law	1
Research and development	1
Social science	1