Dear Yong Peng,

y> I have difficulty looking up for the word bhu~njati in the PTS
y> dictionary (online) at http://dsal.uchicago.edu/dictionaries/pali/

y> Is it because the online version is not complete or it is not
y> included in this dictionary? I can't confirm this as my PTS
y> dictionary (book) is not with me now.

It is included in PTS dictionary as:

1. to eat (in general), to enjoy, make use of, take advantage of, use.

2. to clean, purify, cleanse.

Metta,
Dimitry