Suffix
Of or pertaining to. Adjectival suffix appended to various words, often nouns, to make an adjective form. Often added to words of Latin origin, but used with other words also.
base + -al → basal
cranium + -al → cranial
Forming nouns, especially of verbal action.
propose + -al → proposal
deny + -al → denial
bestow + -al → bestowal
-al
(organic chemistry) Forms the names of aldehydes.
-al
(organic chemistry) Forms the names of aldehydes.