Acha

It is composed of two syllables: "A" and "Cha".

Spelling	a
Closest English pronunciation	/ɑ:/
Hint	As the a in English "art".
Chinese Pinyin	ā á ǎ à
Common characters in names	阿

Spelling	cha
Closest English pronunciation	/tʃɑ:/
Hint	"check" + "art".
Chinese Pinyin	chā chá chǎ chà
Common characters in names	查 茶 察