Strong's #548: 'amanah (pronounced am-aw-naw')
feminine of 543; something fixed, i.e. a covenant. an allowance:--certain portion, sure.
Brown-Driver-Briggs Hebrew Lexicon:
1) faith, support, sure, certain
1a) of a covenant
1b) of financial support
Part of Speech: noun feminine
Relation: from H543
This word is used 2 times:
Nehemiah 9:38: "this we make a sure covenant, and write it; and our princes, Levites, and priests,"
Nehemiah 11:23: "it was the king's commandment concerning them, that a certain portion should be for the singers, due for every day."