4 pics 1 word level 224 on iphone 4?

Can anyone help me please!
1st picture - cheese, bread and a tomato
2nd picture - a mother and child holding blocks to their ears like a telephone
3rd picture - people with black belts doing karate
4th picture - tall sky scrapper building
Letters: BTPQLKHWOKSC
5 letters long
Level 224 on Iphone 4

The word is BLOCK.

Have you tried block

BLOCK