What is the antonym of palpable?

The antonym of palpable depends on the context in which it's being used. Here are some possibilities:

If palpable means "tangible" or "perceptible by touch":

* Intangible

* Impalpable

* Invisible

* Abstract

If palpable means "obvious" or "clearly noticeable":

* Unnoticeable

* Subtle

* Vague

* Indistinct

If palpable means "intense" or "strong":

* Weak

* Faint

* Mild

It's important to consider the specific meaning of "palpable" in the sentence you're trying to create to choose the most appropriate antonym.