From en.wiktionary.org:
** English
*** Pronunciation
- [en] - [en] - [en]
*** Etymology 1
Possibly imitative from teeny weeny, or from [en] + [en]
**** Adjective
[er]
1. [en] Minuscule .
***** Derived terms
[en]
*** Etymology 2
From [en]. The penis term is from its resemblance to a wiener, sometimes thought of as small by influence from teeny weeny.
**** Noun
[en-noun]
1. A wiener , a hot dog . 2. [en] A penis
*** Anagrams
- [en] [en]