A

a(1)

阿 = this character often stands as a representation of the Roman letter 'a' or the Greek letter 'alpha'; in Chinese, it doesn't mean much by itself, but it is part of a number of originally Chinese two-character words; it is also used when foreign words are written with Chinese characters

阿姨 = a(1)yi(2) = aunt, polite address form for a housemaid

阿门 = a(1)men(2) = the 'Amen' with which Christians end prayers

东革阿里 = dong(1)ge(2) a(1)li(3) = tongkat ali (a Malaysian and Indonesian testosterone-enhancing herbal); obviously, as a non-Chinese term, one would not have to use the tones associated with the characters that represent this word

Similar character:

可 = ke(3) = can

Usual form:

可以 = ke(3)yi(1) = can

a(2)

a(3)

a(4)