でしかない details
is nothing but; amounts to no more than
それは言い訳でしかない。
sore wa iiwake de shika nai.
That is nothing but an excuse. neutral
この議論を続けても無駄でしかない。
kono giron o tsuzukete mo muda de shika nai.
Carrying this argument on any further is nothing but a waste. neutral
- noun
- na-adjective
- past
- polite
Examples
is nothing but — denies the thing any identity beyond the one named, as the speaker's verdict
それは言い訳でしかない。
sore wa iiwake de shika nai.
That is nothing but an excuse. neutral
この議論を続けても無駄でしかない。
kono giron o tsuzukete mo muda de shika nai.
Carrying this argument on any further is nothing but a waste. neutral
そんなの、ただの偶然でしかないよ。
sonna no, tada no guuzen de shika nai yo.
That's just a coincidence, nothing more. casual
今回の合意は問題の先送りでしかないと考えております。
konkai no goui wa mondai no sakiokuri de shika nai to kangaete orimasu.
We consider this agreement to be nothing but a postponement of the problem. formal
Formation
{N}でしかないattaches to noun{NA-stem}でしかないattaches to na-adjective
Related patterns
Similar
Both close a thing down to exactly what is named, but だけ states the limit flatly and takes any register, while でしかない is an evaluative tail that only ever appears as a verdict — 言い訳だけ counts, 言い訳でしかない condemns.
にすぎない measures on a scale and reports that the thing reaches no higher, which is why it survives in academic and legal prose; でしかない passes a verdict instead, and carries a contempt にすぎない does not.
Lookalikes
しか〜ない is split across the clause and needs the sentence's own predicate to be negative (千円しかない); でしかない is one fused tail on a noun or na-adjective stem, and its ない negates the copula rather than the clause — so it passes judgement on what the thing IS instead of restricting an argument of the verb.