でしかない follows a noun and says that something is that and nothing more:
"merely", "nothing but". It is the copula with …,
so the sentence is negative in form and limiting in meaning, and it usually
sounds dismissive.
。
That is nothing but an excuse.
。
To him, I am nothing more than a stranger.
でしかない or しかない
Without で, after a verb means "have no choice but", and after a
noun it means "there is only". でしかない does neither: it judges what something
is.
。
There is nothing to do but wait.
。
100 yen is just 100 yen.
でしかない or にすぎない
also means "no more than", and the two often swap. にすぎない
is the flatter, more objective statement of size or rank. でしかない puts the
speaker's disappointment or contempt into it.
。
This is no more than my guess.
。
His promise was only ever words.
Usage notes
These go beyond the plain present form.
ない conjugates like an い-adjective: in the past. In polite
speech it becomes .
。
His words were nothing but lies.
。
That is nothing but a rumor.
Joining a second clause
links to what follows, mostly in writing.
、。
Theory is only theory; practice is what matters.
Lingaku