▁perm its ▁the ▁legit imate ▁extension ▁of ▁existing ▁words ▁to ▁serve ▁new ▁purposes ▁by ▁the ▁addition ▁of ▁prefix es ▁and ▁suffix es . ▁This ▁is ▁sometimes ▁referred ▁to ▁as ▁ag gl ut in ative ▁construction . ▁This ▁process ▁can ▁create ▁arbitr arily ▁long ▁words : ▁for ▁example , ▁the ▁prefix es ▁pseudo ▁( false , ▁sp ur ious ) ▁and ▁anti ▁( ag ain st , ▁opposed ▁to ) ▁can ▁be ▁added ▁as ▁many ▁times ▁as ▁desired . ▁A ▁word ▁like ▁anti - air craft ▁( per tain ing ▁to ▁the ▁defense ▁against ▁aircraft ) ▁is ▁easily ▁extended ▁to ▁anti - anti - air craft ▁( per tain ing ▁to ▁counter act ing ▁the ▁defense ▁against ▁aircraft , ▁a ▁legit imate ▁concept ) ▁and ▁can ▁from ▁there ▁be ▁prefix ed ▁with ▁an ▁end less ▁stream ▁of ▁" anti - " s , ▁each ▁time ▁creating ▁a ▁new ▁level ▁of ▁counter action . ▁More ▁familiar ly , ▁the ▁addition ▁of ▁numerous ▁" gre at " s ▁to ▁a ▁relative , ▁e . g . ▁great - gre at - gre at - grand father , ▁can ▁produce ▁words ▁of ▁arbitrary ▁length . ▁In ▁musical ▁notation , ▁an ▁ 8 1 9 2 nd ▁note ▁may ▁be ▁called ▁a ▁sem ih em ide mis em ih em ide mis em ih em ide mis em iqu aver . ▁ ▁Ant id is est ab lish ment arian ism ▁is ▁the ▁longest ▁common ▁example ▁of ▁a ▁word ▁formed ▁by ▁ag gl ut in ative ▁construction .