usefulness
UK/'juːsf(ʊ)lnəs/US/'ju:sfjlnis/
A1
Definitions
n.
The quality of being useful
有用性，实用性
Root Breakdown
Root-derivedusefuluse
+
-nessstate, quality
=usefulness
useful + -ness (quality of) = 'the quality of being useful.'
Example Sentences
- 1.
The tool has proven its usefulness time and again.
- 2.
They debated the usefulness of the new rule.