tenuis / tenuous [ˈtɛnuəs]
tenuis – n. – Linguistics a plosive or affricate consonant, such as the Greek letters κ, τ, π, or the corresponding k, t, p of Latin, English, and other languages; esp. the sounds represented by these; also called surds, hard mutes, and by Bell breath stops
tenuous – adj. – 1. slender in form, measure or calibre, slim; 2. unsubstantial; 3. weak, of little importance, flimsy, vague