"a heavy knife"
Klingon doesn't have adjectives. Many words which are adjectives in English are verbs in Klingon. This difference is usually shown be the inclusion of "be" in their definition (like 'ugh "be heavy"). These verbs cannot take an object, so when acting as a verb they must come before the subject (such as 'ugh taj "the knife is heavy"). However these verbs can be placed after a noun to describe the noun in an adjectival fashion (taj 'ugh "a heavy knife") - this is not a complete sentence, but rather a noun phrase which can be inserted into the object or subject positions within a sentence (or other noun functions).
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'ugh taj -- the knife is heavy
taj 'ugh -- a heavy knife
Good job, spotting that the verb is in the wrong place for a sentence. This is easy to get mixed up at first, but easy to learn, when you remember that the verb must go before its subject, so if you see a "be verb" after a noun, you know it is doing the job of an adjective. Can you translate these sentences? (tIn is the verb be big, in case you haven't met it yet).
tIn taj 'ugh
'ugh taj tIn