lenis
Concise Oxford English Dictionary © 2008 Oxford University Press:
lenis /ˈlɛnɪs, ˈleɪnɪs, ˈliːnɪs/
▶adjective Phonetics (of a consonant) weakly articulated, especially the less or least strongly articulated of two or more similar consonants. The opposite of fortis.
– origin early 20th cent.: from L., lit. ‘mild, gentle’.
'lenis' also found in these Oxford entries:
