אָמְנָה

From LSJ

ὕδωρ δι' ἀκριβείας ἐστί τινι → water is scarce for someone

Source

English (Strong)

feminine form of אֹ֫מֶן (in its usual sense); adverb, surely: indeed.
feminine of אֹ֫מֶן (in the specific sense of training); tutelage: brought up.