Katakana : ma-mi-mu-me-mo

Let's take a look at the M's. These five are as you should expect... No big surprise.

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マ - ma - as in MAMA It's someone's MAma kicking someone out with her foot. ミ- mi - as in ME It looks like a MEteor shower. ム- mu - as in MOOd It's an upside down MA, pronounced MU. メ- me - as in MAY It looks like a man with his legs tied who MAY fall if he doesn't stop leaning over. モ- mo - as in MOE This looks similar to a lawn MOWer.

Write them out 10 times a day and soon you will get it. To
aid memorization, make silly associations to go
with them. You can use the above mnemonics or you can make your own!

Source: elanguageschool.net