Bottom in English? (5)
I believe the answer is:
basic
This could be a double definition.
'bottom' is the first definition.
(thesaurus)
'english?' is the second definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'in' is the link.
Can you help me to learn more?
(Other definitions for basic that I've seen before include "Fundamental -- early computer language" , "Forming a foundation" , "Spartan" , "Fundamental; alkaline" , "Radical" .)