了
JLPT HSK 1

le, liǎo
A child 子, but without arms
A child without arms? I understand: It has to be completed!

	疗
JLPT HSK 5

liáo
Left: disease 疒 (An ice- 冫-cold building 广 makes sick.), right: past tense identifer, to fulfill 了 (The still arm-less 了 child 子 should be completed.)
Turning the disease into 'history', means: treatment. - Or: The disease of the arm-less 了 child 子, shall be treated.

	哼
JLPT HSK 6

hēng
Left: mouth 口, right: prosperous 亨 (Who makes big/high 高 things to accomplish 了 is prosperous.) [了 = The still arm-less 了 child 子 should be completed.]
Out of the mouth 口 below the nose 亠, this mouth 口, comes out 了 a groan.

	辽
JLPT HSK 6

liáo
Left: movement 辶, right: perfect suffix, to accomplish 了 (The still arm-less 了 child 子 should be completed.)
Since his movement was in perfect tense, he is in far distance.

	亨
JLPT no HSK

hēng
Top: vari. of high 高, bottom: perfect suffix 了 for accomplishing (The still arm-less 了 child 子 should be completed.)
Who makes big/high things to accomplish is prosperous.

	亟
JLPT no HSK

jí, qì
Outside: sigh, gasp 叹 (The mouth 口 should be (covered) with the hand 又, when: sighing.), inside: to accomplish (Past-suffix) 了 (The still arm-less 了 child 子 should be completed.), one 一
He sighed at the completion because it was so urgent.