奇 - strange - extraño

Word:

• 奇跡　KIseki
• English: miracle
• Spanish: milagro

Sentence:

• 彼が飛行機事故で助かったのは奇跡だ
• kare ga hikōki jiko de tasukatta no ha kiseki da
• It's a miracle he wasn't killed in the plane crash
• Es un milagro que se salvara en el accidente de avion

Mnemonics:

• The upper Kanji means big 大 and it looks like a man opening his arms. The lower part
  indicates possibility 可
• I found it easy to imagine that the Kanji represents a man about to jump to the track of a train that is passing a tunel in order to commit suicide. Isn't it strange that in Japan there are so many suicides?!
• All these Kanji that have it as radical are pronnounced KI as well: 寄騎碕倚剞掎欹

替 - exchange - intercambio

Word:

• 着替える　kiGAERU
• English: changing clothes
• Spanish: cambiarse de ropa

Sentence:

• 私は服を着替えるために家へ帰った
• watashi ha fuku wo kigaeru tame ni uchi e kaetta
• I went home in order to change my clothes.
• Volvi a casa para cambiarme de ropa

Mnemonics:

• The upper part are two husband 夫 and the lower part means day 日. Imagine two couples going spend the day on the beach. When they arrive, the two husbands realized that they forgot the swim clothes to change, so they have to be in the beach in underwear!!

袋 - sack - saco

Word:

• 手袋　teBUKURO
• English: gloves
• Spanish: guantes

Sentence:

• 彼女は車の中に手袋を置き忘れた
• kanojo ha kuruma no naka ni tebukuro wo okiwasureta
• She left her GLOVES in the car
• Se le olvidaron los GUANTES dentro del coche

Mnemonics:

• Upper part means to change 代 and lower part means clothes 衣. Most Kanji that contain the clothes part 衣, refer to some kind of clothes. Imagine a person that has a collection of gloves with thousands of colors. Every day he changes color of his gloves!!