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dur adj.
gen.	rock
construct.	stiff; solid
hobby, cultur.	contrasty; vigorous
med.	hard
pack.	rigid
French thesaurus
dur être au adj.
slang	en réclusion; être dans son, travailler avec énergie

dur: 663 phrases in 75 subjects

Agriculture	35
American usage, not spelling	1
Antennas and waveguides	3
Banking	3
Botany	8
Boxing	4
British usage, not spelling	1
Chemistry	14
Coal	1
Commerce	1
Communications	5
Computers	11
Construction	25
Criminal law	1
Cultural studies	4
Earth sciences	10
Economy	3
Electrochemistry	1
Electronics	8
Energy industry	3
Environment	5
European Union	1
Finances	6
Food industry	1
General	70
Geography	4
Health care	3
High energy physics	3
Hobbies and pastimes	8
Humorous / Jocular	2
Immigration and citizenship	1
Industry	55
Informal	6
Information technology	10
International Monetary Fund	4
International trade	3
Laboratory equipment	2
Law	5
Leather	1
Life sciences	19
Marketing	1
Materials science	7
Mathematics	1
Mechanic engineering	2
Medical	62
Medical appliances	7
Metallurgy	68
Microsoft	10
Military	1
Mineral products	1
Municipal planning	3
Name of organization	3
Natural sciences	12
Nuclear physics	9
Oceanography & oceanology	2
Ornithology	6
Packaging	15
Patents	2
Pharmacy and pharmacology	1
Phonology	1
Resins	1
Scientific	1
Skiing	2
Social science	1
Statistics	1
Technology	23
Telecommunications	2
Tennis	1
Textile industry	1
Transport	39
United Nations	1
Volleyball	1
Water polo	1
Wood processing	11
Радиоактивное излучение	12