说明 + 来意 / 来意 + 是
The noun 来意 (láiyì) means 'purpose of one's visit' or 'the reason for coming.' It is a formal word used to refer to the intention behind someone's arrival. It commonly appears in the phrase 说明来意 (to state the purpose of one's visit).
请您先说明来意,我好帮您安排。
qǐng nín xiān shuōmíng láiyì, wǒ hǎo bāng nín ānpái.
Please state your purpose first, so I can arrange things for you.
他还没说明来意就被请了出去。
tā hái méi shuōmíng láiyì jiù bèi qǐng le chūqù.
He was asked to leave before he could even state his purpose.
来访者坐下后,直接说明了来意。
láifǎng zhě zuò xià hòu, zhíjiē shuōmíng le láiyì.
After the visitor sat down, they directly stated their purpose.