power

(termite pie) + (round) + (strong)
★★☆☆☆
13 strokes

Onyomi

SEI

Mnemonic

They SAY that if you eat a round termite pie you'll get strong powers.

Kunyomi

いきお*い most dictionaries/books/apps define this as POWER but it's more like momentum, (a power which is in motion). The power to influence something - like "The car had a lot of 勢い so it was hard to stop the car before we hit the cat." or "Because of the whiskey's 勢い, I could do a table dance in the White House."

Also means to gain steam or lose steam - said of political momentum or the momentum of a trend or ideology.
★★☆☆☆

Jukugo

姿勢(しせい)

posture ★★★☆☆
姿 (someone's shape, body, form) + (power) = 姿勢 (posture)

posture -  posture, both literal and figurative. Unlike the related word 態度(たいど) one's 姿勢 is always intentional - something one consciously adopts.

大勢(おおぜい)

crowd ☆☆☆☆☆
(big) + (power) = 大勢 (crowd)

a large number of people - not in the sense of 'It's crowded today' but like 'There were crowds waiting to greet the Ambassador' - the crowd is united in its purpose.

Synonyms

behavior/ action
態度    姿勢    行動    行為   
power, authority
勢い    力    権力    威力    政権    権利    権威   
surpass
優勢    優秀な    秀でる