An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

A person who questions the validity or authenticity of something purporting to be factual.

From M.Fr. sceptique and directly from L. scepticus "the sect of Skeptics," from Gk. skeptikos "thoughtful, inquiring" (plural Skeptikoi "the Skeptics, followers of Gk. philosopher Pyrrho," who lived c. 360-270 B.C.). from skeptesthai "to reflect, look, view," → spectrum.

Šakdâvar, šakmand, from šakk, → doubt, + -âr contraction od âvardan "to bring, to cause, to produce," → cause, or -mand suffix of relation/possession.

1) Inclined to skepticism; having an attitude of doubt.
2) Doubtful about a particular thing.

→ skeptic; → -al.

1) A doubting or questioning attitude or state of mind.
2a) The ancient school of Pyrrho of Elis that stressed the uncertainty of our beliefs in order to oppose dogmatism.
2b) The doctrine that absolute knowledge is impossible, either in a particular domain or in general.
2c) A methodology based on an assumption of doubt with the aim of acquiring approximate or relative certainty.
3) Doubt or disbelief of religious tenets (TheFreeDictionary.com).

→ skeptic; → -ism.