Klas, profesor, koledzh: one consonant instead of two
Borrowed words give up their double consonants at the border: where English writes two letters, Ukrainian writes one. Klas, kasa, masa, profesor, koledzh, atestat, hryp, baroko, suma, grupa, plastmasa, komisiia. For example: “Професор читає лекцію (Profesor chytaie lektsiiu) в (v) аудиторії” — The professor is giving a lecture in the lecture hall. A rule from the Ukrainian course: worked out on examples, not memorized as a wording.
How it works
Borrowed words give up their double consonants at the border: where English writes two letters, Ukrainian writes one. Klas, kasa, masa, profesor, koledzh, atestat, hryp, baroko, suma, grupa, plastmasa, komisiia.
The exceptions are proper names and a few settled words: vanna, manna, Holandiia, Nitsa.
Native words are the opposite: there double consonants are alive and required. The parts of the word genuinely meet: zannia, zhyttia, pytannia, viddilennia, ozdoblemnia.
Two more habits of the same border. Greek and Latin words keep their i as i: istoriia, himnaziia, informatyka, dystsyplina, fizyka. And where other alphabets keep a special letter for the other e sound, Ukrainian does not. Plain e writes it: ekzamen, etap, efekt, epokha.
Table
| with doubles | in Ukrainian | what changed |
|---|---|---|
| class | klas | a single s |
| professor | profesor | a single s |
| history | istoriia | the i of Latin roots |
| effect | efekt | plain e, one f |
| knowledge | zannia | a native nn stays |
By example
How the rule settles in your head
A rule is not memorized from an explanation. It is memorized from an attempt to use it and a mistake — that is why the app delivers it mixed in with words, not as a separate lesson: it resurfaces exactly where you forgot it.
Frequently asked
Why it is klas and profesor, one s each?
Borrowed words give up their double consonants at the border: where English writes two letters, Ukrainian writes one. Klas, kasa, masa, profesor, koledzh, atestat, hryp, baroko, suma, grupa, plastmasa, komisiia.
What does it look like in a Ukrainian example sentence?
“Професор читає лекцію (Profesor chytaie lektsiiu) в (v) аудиторії” (Profesor chytaie lektsiiu v audytorii) — The professor is giving a lecture in the lecture hall. A rule is easier to test on sentences like this than to memorize as a wording: what surfaces in conversation is the sentence.