Placeholder for particle searching
I will be merging the particle dictionary and the particles chapter from the grammar book into a unified resource, which you will be able to search. However, this will take a bit of time. In the mean time searching the regular dictionary will of course work, although the information will not be as rich as the information from the specifically-particle dictionary.
This functionality has not yet been programmed in, so if you have a better idea, or you think you can make a case for separate searching, do let me know by visiting the contact page and leaving a comment about this.