mercenary (adj)
Motivated solely by a desire for monetary or material gain.
欲得ずくの、報酬目当ての、金銭に卑しい

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But one man present took the speaker at his word. That man was the lawyer who had already undertaken the defence of the Countess.

'I stand alone in my opinion,' he said, 'and I am not ashamed of repeating it in anybody's hearing. I consider the Countess Narona to be a cruelly-treated woman. Why shouldn't she be Lord Montbarry's wife? Who can say she has a mercenary motive in marrying him?'

Montbarry's brother turned sharply on the speaker. 'I say it!' he answered.

The reply might have shaken some men. The lawyer stood on his ground as firmly as ever.

'I believe I am right,' he rejoined, 'in stating that his lordship's income is not more than sufficient to support his station in life; also that it is an income derived almost entirely from landed property in Ireland, every acre of which is entailed.'

(The Haunted Hotel -- by Wikie Collins)