important

(west top) + (woman)
★★★★★
9 strokes

Onyomi

YOU

Mnemonic

In the west, it is important for women to YODEL regularly.

Kunyomi

( ) い*る to need something super important - but always written in kana, so I'm giving it a usefullness of zero, even though as a hiragana word it's more like a 3 or 4. KANA
☆☆☆☆☆
よう*する ( ) in short, in sum LAZYNP
★★★☆☆
かなめ the one key point, the lynchpin of
☆☆☆☆☆

Jukugo

重要(じゅうよう)

essential ★★★★☆
(heavy / overlap) + (important) = 重要 (essential)

要点(ようてん)

the important points ★★☆☆☆
(important) + (point) = 要点 (the important points)

the important points (unlike the related word 重点(じゅうてん)、 要点 is more than one point - more like a summary. Like instead of writing an essay, you'd just do a series of bullet points.
Example phrase:要点だけ話して! ("Get to the point!")

要求(ようきゅう) する

demand ★★☆☆☆
(important) + (demand/ask) = 要求 (demand)

demand - more strident than the related word 求める (もとめる)

需要(じゅよう)

demand ★★☆☆☆ NP
(demand) + (important) = 需要 (demand)

demand in the economic sense - supply and demand

This does NOT get to turn into a verb. You don't use する. You'd say 需要がある (there's a demand for xxx) or perhaps  需要を 満たす (じゅようをもたす) (there's enough of xxx to meet the demand).

Used In

Synonyms

demand
求める    要求    需要    請求    欲求   
important, vital
必要    大切    重大    重要    大事   
summary
つまりxxxx 要約    要はxxx   
the point is...
重点    要点    焦点