Trimer or Trimmer: How To spell?
The word Trimer is misspelled against Trimmer, a noun meaning "A beam, into which are framed the ends of headers in floor framing, as when a hole is to be left for stairs, or to avoid bringing joists near chimneys, and the like. See Illust. of Header."
Trimmer has double "mm" is mispronounced as "m"Remember double 'MM' in between the strings tri & er which should not be misspelled with single 'M'
Wrong Spelling:  tri-m-er  Correct Spelling:  tri-mm-er 
Find more wrongly spelled words of Trimmer to spell it well.