глаз да глаз

• ГЛАЗ ДА ГЛАЗ нужен за кем-чем coll

[NP; Invar; subj]

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⇒ s.o. or sth. should be kept under strict, constant supervision:

- за Х'ом нужен глаз да глаз{{}}≈ X has to be watched all the time (constantly);

- X must be closely watched;

- person Y must keep a close eye on (a constant watch over) X.

     ♦ Второй период [нашей совместной жизни] ознаменовался тем, что я перестала быть добычей, украденной Европой, девчонкой, за которой нужен глаз да глаз. Нас стало двое (Мандельштам 2). The noteworthy thing about this second period [of our life together] was that he [Mandelstam] ceased to treat me as a prize he had carried off, a Europa abducted by Zeus, a little girl who had to be watched all the time. We now became a real couple (2a).

     ♦ Надо же! За арестантом, который тянет голодовку почти два месяца, нужен глаз да глаз: "склонен к побегу" (Марченко 2). What will they think of next! A prisoner who maintains a hunger strike for nearly two months must be closely watched, as he displays tendencies to try to escape" (2a).