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преследовать по закону stresses
dial.	trounce
law	prosecute
polit.	prosecute under law (ЛВ)
преследоваться по закону
comp.	subject to legal action (о защите авторских прав translator911)
law	be punishable by law (Юрий Гомон); be prosecuted (Юрий Гомон); be liable to legal prosecution (Johnny Bravo)
преследуется по закону
gen.	is subject to legal prosecution (surpina); be a punishable offence (AD Alexander Demidov)

преследовать по закону: 8 phrases in 4 subjects

British usage, not spelling	2
General	1
Law	4
Technology	1