Hi could anyone tell me what is the purpose of the suffix 'ish' at the end of the adjectives 'girlish' and 'boyish? I mean you could use the suffix 'ly' but what is the need of the ish? I know that it indicates that the person being described is not entirely behaving like a 'girl' or 'boy' but can anyone shed any light on the actual purpose? I would be grateful if you could direct me to any literature or references to support.
Thank you! :)