It isn’t the literal meanings of the words that make it difficult. It’s the connotations — all those associated ideas that hang around a word like shadows of other meanings. It’s connotation that makes house different from home, and makes scheme into something shadier in American English than it is in British English.
A good translator, accordingly, will try to convey the connotative as well as the literal meanings in the text; but sometimes that can be a whole bundle of meanings at once, and trying to fit all of them into the space available can be like trying to stuff a down sleeping bag back into its sack.
A couple of my favorite examples, from Old English because that’s what I studied:
“Cold” in Old English (and in the older Scandinavian languages in general) has, in addition to its literal meaning, connotations of “fated” — usually “ill-fated,” because nobody in the old Germanic literature ever had good luck — and “unlucky.”
So in the Old English poem “The Battle of Maldon,” when the poet says, Ongan ceallian þa ofer cald wæter Byrhtelmes bearn (“Then Bryhthelm’s son began to call out over the cold water”), the listener/reader knows that bad stuff is about to go down . . . as indeed it does, because what happens next is that the raiding Vikings wade across the ford — the cold, unlucky water — to engage with the Essex fyrd (the militia, more or less), and heroic disaster ensues.
Another of my favorites comes in the closing lines of Beowulf, after the hero is dead and everybody is explaining to everybody else just how bad things are going to get now that he’s gone (this is known as the Old English elegaic mode, and J. R. R. Tolkien stole large chunks of it outright for the poetry of the Rohirrim): Forðon sceall gar wesan monig, morgenceald, mundum bewunden, hæfen on handa… (“Therefore shall many a morning-cold spear be grasped in the fingers, hefted in the hand…”) That passage gives us the ill-fated “cold” again, and adds “morning” to it — morning, in Old English epic poetry, was a bad time of day, the time for surprise attacks and general low spirits.
All you need after that are two ravens flying past, and the wolves howling.