To suss out somebody or something (or suss somebody or something out) is to think about and come to understand what someone or something is like; or to work out how something works, or to find the solution to a problem.
Informal British and Australian English.
suss (verb) – to uncover the truth about something or someone; to understand
In British English, work out is also used in the same way.
In American English, the equivalent is figure out.
Examples of use:
1. I've finally sussed out how my new camera works!
2. He just can't suss her out. One minute she's happy; the next minute she's miserable.
3. They haven't sussed out where the water leak in their kitchen is coming from.
4. My car keeps making a strange noise. I'm going to take it to the garage and see if they can suss out what the problem is.
| infinitive |
suss out |
| present simple |
suss out and susses out |
| -ing form |
sussing out |
| past simple |
sussed out |
| past participle |
sussed out |
Image © Steve Brace






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