Character decomposition: let’s break it down to it’s components to figure it out. 试
yanzipang on the left is the abbreviated form of 言 which is a mouth sending out sound waves and means to say and looks like the western letter i in the simplified form of writing. This determinant tells us the character involves speaking or talking or words somehow, the idea of communication. When we TRY things we must talk about them both to learn the proper form and then to produce the proper form.
工 Gong1 is a work tool 工. It’s a picture of a Chinese two pronged pitch-fork with the handle on top and the tines below.
弋 yi4 is a retrievable throwing dart attached to a line.
working tool + retrievable throwing dart = form pattern style
式 shi4 mean form, pattern, style: I suppose it is a combined concept word (会议字) where two pictures/ideas come together to express a third.
Namely: Working with one’s hunting tools requires good form, proper pattern, a selective style.
式 is the phonetic element of 试. 试 is evidently a phono-semantic character.
AN ATTEMPT, TO TRY, TO TEST