| unaussprechlich Âunsagbar Âunsäglich |
| heilig Âtabu Âunantastbar Âunaussprechlich Âverboten Âverpönt |
| unaussprechlich unsagbar unsäglich |
| unpronounceable unutterable | very difficult to pronounce correctly, an unpronounceable foreign word, unutterable consonant clusters |
| unpronounceable | impossible or difficult to pronounce correctly |