Englishfor English speakers
big
Adjective
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If something is big, it is large in size; tall, wide, long, or fat.
He's bigger than me.
I would like a big glass of milk.
The tree was so big that you could see it over the top of the house.
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If something is big, it is important.
That's a big problem!
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Someone's big brother or a big sister is one who is older than the person.
I have a big brother who's stronger than you!
grin
Noun
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A grin is a small smile, or a smile where you can see the teeth.
grin
Verb
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If you grin, you smile a little bit, or with your teeth visible.