▁Guide ▁and ▁The ▁New ▁Zealand ▁Her ald . ▁ ▁Polish ▁ ▁Very ▁long ▁Polish ▁words ▁can ▁be ▁created ▁as ▁ad ject ives ▁from ▁numer als ▁and ▁n oun s . ▁For ▁example , ▁, ▁ 5 4 ▁letters , ▁is ▁the ▁gen itive ▁singular ▁form ▁of ▁an ▁ad jective ▁meaning ▁roughly ▁" of ▁nine - h undred ▁and ▁nin ety - n ine ▁national ities ". ▁Similar ▁words ▁are ▁rather ▁artificial ▁comp ounds , ▁constructed ▁within ▁allowed ▁grammar ▁rules , ▁but ▁are ▁s eld om ▁used ▁in ▁spoken ▁language , ▁although ▁they ▁are ▁not ▁n ons ense ▁words . ▁It ▁is ▁possible ▁to ▁make ▁even ▁longer ▁words ▁in ▁this ▁way , ▁for ▁example : ▁▁ ▁( 1 7 6 ▁letters , ▁meaning ▁" of ▁ 9 9 9 , 9 9 9 , 9 9 9 , 9 9 9 ▁years ▁old "). ▁ ▁One ▁of ▁the ▁longest ▁common ▁words ▁is ▁ 3 1 - letter ▁ ▁– ▁the ▁d ative ▁singular ▁form ▁of ▁" n in ety - and - some ▁years ▁old ▁one ". ▁Another ▁common ▁long ▁word ▁is ▁ ▁( 2 3 ▁letters ), ▁" a ▁ 5 0 ▁gros zy ▁coin ". ▁ ▁Russian ▁▁ ▁Most ▁likely ▁one ▁of ▁the ▁longest ▁Russian ▁words ▁is ▁a ▁chemical ▁term ▁ ▁( ), ▁which ▁contains ▁ 5 5 ▁letters . ▁It ▁was ▁used ▁in ▁Russian ▁pat ent ▁R U 2 2 8 5 0 0 4 C 2 ▁( gr anted ▁and ▁published ▁in ▁ 2 0 0 6 ). ▁This ▁word