実家 [じっか] – home (of one’s parents)
実 [ジツ・み] – reality
家 [カ・いえ] – house; home
Notice that today’s word is pronounced じっか instead of じつか。This is a euphonic change, and happens quite a bit in Japanese. Heck, it even occurs in one pronunciation of the word “Japan.” 日本 can not only be pronounced にほん, but also にっぽん. The small hiragana っ doubles the consonant sound of the upcoming consonant rather than having a voiced sound of its own. In katakana, it looks like ッ.
To type this character on your computer, either type a double consonant or the letter x + つ. Try it out and see if you can get it to work.