English word occasional comes from English occasion, English -al.
Occasional detailed word origin explanation
|occasion || English (eng) ||(obsolete) An occurrence or incident. [14th-18th c.]. A favorable opportunity; a convenient or timely chance. [from 14th c.]. A particular happening; an instance or time when something occurred. [from 15th c.]. A reason or excuse; a motive; a persuasion.. A special event or function. [from 19th c.]. An occurrence or state of affairs which causes some event or reaction; a motive or reason. [...] |
|-al || English (eng) ||(organic chemistry) Forms the names of aldehydes. Forming nouns, especially of verbal action.. 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. |
|occasional || English (eng) ||Acting in the indicated role from time to time.. Created for a specific occasion.. Intended for use as the occasion requires.. Occurring or appearing irregularly from time to time, but not often. |
Words with the same origin as occasional