invaluable adj.

VERBS be, prove | become | remain | make sb/sth His knowledge of the area made him invaluable. | find sth You will find their help absolutely invaluable.

ADV. absolutely, quite

PREP. for This technology is invaluable for pupils with poor sight. | to Your support has been invaluable to us.

You can also check Google Dictionary: invaluable (English, 中文解释 )

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