ʽ

A diacritical mark of the Greek script, called δασεῖα (daseîa, “rough”) in Ancient Greek, and found on Ἁ (Ἁ)/Ἑ (Ἑ), Ἡ (Ἡ)/Ἱ (Ἱ), Ὁ (Ὁ)/Ῥ (Ῥ) and Ὑ (Ὑ)/Ὡ (Ὡ). It is also known by its Latin name spīritus asper or the English name rough breathing. It was originally used to indicate the presence of the sound /h/ before a vowel or /r/ but continued to be used even after /h/ had disappeared from the language.

(Greek-script letters) Α α, Β β, Γ γ, Δ δ, Ε ε, Ζ ζ, Η η, Θ θ, Ι ι, Κ κ, Λ λ, Μ μ, Ν ν, Ξ ξ, Ο ο, Π π, Ρ ρ, Σ σ ς, Τ τ, Υ υ, Φ φ, Χ χ, Ψ ψ, Ω ω
(non-Classical letters) Ϝ (W) ϝ (w), Ͷ ͷ, Ͱ (H) ͱ (h), Ϻ (S) ϻ (s), Ϟ, ϟ, Ϙ (Q) ϙ (q), Ͳ (S) ͳ (s)
(punctuation) · ;
(diacritics) ᾿ ῾ ◌́ ◌̀ ῀ ¨
δασεία