The break is the range. Anguish, yearning, and boredom are different English words. Toska is one Russian word that travels the whole scale.
Russian тоска. Vladimir Nabokov, in his commentary to Eugene Onegin, says no single English word renders all its shades, and he runs it from spiritual anguish down to boredom.
Where the line breaks
Alignment of тоска into 4 lanes. Arrives, thins, and breaks are written in each cell. The same information is in the text alternative below.
RUParts
the deep endAnguish
the middleYearning
the low endBoredom
RUSourceтоска
the deep endSource
the middleSource
the low endSource
ENEnglishPublished translationno single word
anguishThinsConnotation
yearningThinsConnotation
boredomBreaksLexical gap
Published translation. Nabokov’s own claim in the Eugene Onegin commentary. This plate paraphrases his scale and does not reproduce the paragraph.
DEGermanCommon substituteSehnsucht
SchwermutThinsConnotation
SehnsuchtThinsConnotation
LangeweileBreaksConnotation
Common substitute. The word German reaches for. It matches the yearning band and not the boredom band.
FRFrenchCommon substituteangoisse
angoisseThinsConnotation
nostalgieThinsConnotation
ennuiThinsConnotation
Common substitute. A word that covers the painful end. The low end needs ennui, which French does have, as a separate item.
JAJapaneseGloss for this plateものうい憂い
苦悶ThinsConnotation
憧れThinsConnotation
退屈BreaksLexical gap
Gloss for this plate. A gloss, not a standard equivalent. Japanese, like English, splits the scale.
Text alternative
English “no single word” (published translation): breaks: lexical gap. German “Sehnsucht” (common substitute): breaks: connotation. French “angoisse” (common substitute): thins: connotation. Japanese “ものうい憂い” (gloss for this plate): breaks: lexical gap.
the deep endAnguish
At its heaviest, a spiritual anguish, often without a named cause. Nabokov’s description, paraphrased from the Onegin commentary, starts here.
What happens to “the deep end” in each lane
Lane
Form
Status
Break
What happens
English
anguish
Thins
Connotation
Covers the top of the scale only.
German
Schwermut
Thins
Connotation
Heaviness, melancholy. A different word, for the top.
French
angoisse
Thins
Connotation
Anguish. The top, with a more existential flavor than every use of toska.
Japanese
苦悶
Thins
Connotation
苦悶 is torment. It will not also mean boredom.
the middleYearning
A longing with nothing clearly longed for, or a longing for someone specific: nostalgia, lovesickness, restlessness.
What happens to “the middle” in each lane
Lane
Form
Status
Break
What happens
English
yearning
Thins
Connotation
Covers the middle only.
German
Sehnsucht
Thins
Connotation
The middle band. Real overlap, not identity.
French
nostalgie
Thins
Connotation
A neighboring middle, not the same middle.
Japanese
憧れ
Thins
Connotation
Yearning. The middle only.
the low endBoredom
At the bottom of the scale it grades into ennui and boredom, skuka. One word, three weathers.
What happens to “the low end” in each lane
Lane
Form
Status
Break
What happens
English
boredom
Breaks
Lexical gap
An English translator who picks one of these has dropped the other two. The gap is the missing single word, which Nabokov says English does not have.
German
Langeweile
Breaks
Connotation
Boredom is a third German word. Toska’s scale is split across the lexicon.
French
ennui
Thins
Connotation
French can name the bottom. It cannot name all three with one noun.
Japanese
退屈
Breaks
Lexical gap
退屈 is boredom. A translator picks a band.
The joint
Тоска is ordinary Russian. It is not a rare mystical noun. Nabokov’s note in the Eugene Onegin commentary is famous because he refuses the single English equivalent and lists the weather instead: spiritual anguish without a cause, a dull ache, yearning, lovesickness, and at the bottom ennui. The paraphrase here follows that scale and does not copy his paragraph.
The break is not that English cannot feel any of these. It is that English cannot feel them as one word. Choose “anguish” and the boredom is insulted. Choose “boredom” and the anguish is trivialized. German Sehnsucht catches the longing and misses the skuka. French has both angoisse and ennui, which is exactly the problem: two words, for one.
A good translation of a passage picks the band the passage is in. A glossary that equates toska with one band has made Nabokov’s point by accident.
Why this break matters to a reader
A reader who learns toska as “Russian melancholy” has been given a postcard. A reader who learns it as a scale can hear which step a sentence is standing on. In a novel, that step changes the scene. Boredom and spiritual anguish are not a matter of tone. They are different events. The Russian word can slide from one to the other without changing clothes. The translation has to change clothes, and should show that it did.