also

Từ điển American Heritage Dictionary 4th

al·so (ôlʹsō)adv.
1. In addition; besides.
2. Likewise; too:
If you will stay, I will also.conj.
And in addition:
It's a pretty cat, also friendly. [Middle English, from Old English ealswā: eall, all; See al-³ in Indo-European Roots + swā, so; see so¹.] 
Usage Note: Some maintain that it is inappropriate to begin a sentence with also. In an earlier survey, however, 63 percent of the Usage Panel found acceptable the example The warranty covers all power-train components. Also, participating dealers back their work with a free lifetime service guarantee.

• Từ đồng nghĩa / Synonyms:
  besides, too, likewise, as well