OZ
OZDIC
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insoluble
mastery
UK /ɪnˈsɒljʊbəl/
US /ɪnˈsɑljəbəl/
adj
noun
card 1 of 10
· fill in the blank
Despite many attempts, the puzzle remained
_____
.
1.
insoluble
2.
soluble
3.
dissolvable
4.
indissoluble
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