Keyword
simultaneously
Info
FrequencyTop 1400-1500
Type
Jōyō 
?
Shinjitai ?
KankenLevel Pre-2
Heisig1866
Old form
Readings
せい
(99%)
Composed of
written sentence
slash left
two
stick
Mnemonic components
written sentence
moon
Mnemonic

You can't simultaneously look down writing sentences in your notebook and look up at the moon at the same time. Well, maybe you can if you'd hold your notebook up with one hand covering part of the moon with it and write with your other hand.

Used in kanji (2 in total)
settle
chemical substance
Used in vocabulary (35 in total)
simultaneously; all at once; in unison
simultaneous; all at once
volley; fusillade
Examples (9 in total)
We all jumped into the water at the same time.
They all stood up at the same time.
All at once they began to laugh.