A short temper too — 短い is the end arriving at once

Where the picture shows up in 短い

1. 1

   an object's end arrives at once

   この紐は少し短いですね。

   kono himo wa sukoshi mijikai desu ne

   This string is a bit short.

   Two ends of string that cannot reach each other around a box

2. 2

   time's end arrives at once

   昼休みが短いです。

   hiru-yasumi ga mijikai desu

   The lunch break is short.

   Having to stand up again with the bento only half eaten

3. 3

   pulling the end of speech closer

   時間がないので短く話します。

   jikan ga nai node mijikaku hanashimasu

   There's no time, so I'll keep it short.

   Folding a long speech down with your hands into two sentences

   短く plus a verb = to do it briefly.

4. 4

   pulling a length closer

   髪を短く切ってください。

   kami o mijikaku kitte kudasai

   Please cut my hair short.

   Scissors drawing the ends of the hair up above the ears

   Exactly what you say at the hairdresser.

5. 5

   the distance to anger arrives at once

   父は気が短いんです。

   chichi wa ki ga mijikai n desu

   My father has a short temper.

   A spark running up a short fuse and reaching the end in an instant

   気が短い is the set phrase for short-tempered.