The word "Obimbricate" is quite a mouthful to pronounce and spell. But understanding its spelling is easier if you use the International Phonetic Alphabet (IPA) transcription. The word is pronounced as /əʊˈbɪmbrɪkət/. The "o" sound is long and stressed, while the "i" is pronounced as "ee". The "c" is sounded as "k" while the "a" in the last syllable is silent. The word means to cover with clouds or overshadow. And while it may seem a difficult word to master, getting the spelling right is key for clear communication.
In bot., having the imbrication directed downwards.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.