Some source language idiomatic and stable expressions may have a peculiar nature of their componental parts or a peculiar combination of them and thus form nationally peculiar expressiveness and picturesqueness of componental images. The latter constitute some hidden meaning, which is mostly not quite explicit and comprehensible, not transient enough for the foreigner.
As a result, there exist no genuine phraseological analogies for the units in the target language. Since it is so, their lexical meaning can be expressed by means of only approximate analogies or through explication, i.e., in a descriptive way. These analogies are only to a slight degree similar to the source language idioms, although they may be no less picturesque and expressive than the source language variants: Wnd words butter no parsnips годувати байками солов'я; to lose one's breath кидати слова на вітер; to make a cat's paw of something чужими руками жар вигрібати; а joint in one's armour ахіллесова п'ята (вразливе місце); fne sow loves bran better than roses кому що, а курці просо; more power to your elbow ні пуху, ні луски!; to come off scot free вийти сухим з води; to be finger and thumb водою не розлити (cf. нерозлийвода); to be from Missouri (Amer.) вірити тільки своїм очам; it is six and half a dozen не вмер Данило, так болячка задавила; what's Hecuba to me моя хата скраю; to get the blues місця собі не знаходити/ сумувати, etc.
No need to emphasize that selection of approximate analogies for a translator is no easy task, as the source languages idioms/ phraseologisms often bear some characteristics of a language's traits having no correspondence^ the target language. Cf.: The answer's a lemon так не буде, такне вийде.
Many idioms have obscure origin/etymology and selecting of approximate equivalents as any other corresponding semantic variants often requires a linguistic investigation on the part of the translator. For example: to be in the cart means to be closed in a cage as a convict (for some crime) and be exposed to general scorn of one's compatriots (as in old times in England). It may be translated into Ukrainian as бути в стані/ситуації хоч круть хоч верть, потрапити в безвихідь.