etymologeek.com dictionary
English word phenomenal comes from English phenomenon (which itself derives from Ancient Greek φαινόμενον - "that which appears") and suffix -al.

Phenomenal etymology history?

Phenomenal detailed word origin explanation

Dictionary entryLanguageDefinition
phenomenon English (eng) (extension) A knowable thing or event (eg by inference, especially in science).. (metonymy) A kind or type of phenomenon (sense 1 or 2).. (philosophy, chiefly, Kantian, _, idealism) An experienced object whose constitution reflects the order and conceptual structure imposed upon it by the human mind (especially by the powers of perception and understanding).. A fact or event considered very [...]
-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.
phenomenal English (eng) (colloquial) Very remarkable; highly extraordinary; amazing.. (philosophy) Of or pertaining to the appearance of the world, as opposed to the ultimate nature of the world as it is in itself.. (scientific) Perceptible by the senses through immediate experience.

Words with the same origin as phenomenal

Descendants of -al
additional approval arrival betrayal chemical confidential critical cultural disposal emotional historical identical lex logical magical mechanical mental political practical professional proposal rehearsal serial survival traditional