speak to
1. To converse with, address
2. To rebuke, scold
3. To attest, testify to
4. To comment on, discuss
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Main Entry: ↑speak
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ˈspeak to [transitive] [present tense I/you/we/they speak to he/she/it speaks to present participle speaking to past tense spoke to past participle spoken to] phrasal verb
to talk to someone who has done something wrong in an effort to persuade them to improve their behaviour
speak to someone about something:
You really ought to speak to him about coming late to class.
Main entry: speak
Useful english dictionary. 2012.