Learn Turkish: Patronum çok katı, keşke stresim biraz hafiflese. - My boss is very strict, I wish my stress would ease a little.

In Turkish, wishes about the present or future are formed by using keşke (if only / I wish) followed by a verb in the conditional mood (-se or -sa). Even though English uses "would ease," Turkish expresses this structurally as "if only it eased."

The English translation says "I wish", but there is no "I" ending on the verb hafiflese. Why is that?

The word keşke expresses the feeling of "I wish" or "if only" all by itself. The verb hafiflese doesn't need an "I" ending because the subject of that specific action is your stress (stresim). It takes the third-person ending (just -se) because the literal meaning is "if only my stress would ease."

I recognize the adjective hafif (light). How does it become the verb hafiflese here?

You can often turn nouns or adjectives into verbs in Turkish by adding the suffix -le or -la, which means "to become [adjective]." Here, hafif (light) becomes hafiflemek (to become light, to ease). Then, the conditional suffix -se is added directly to the stem (hafifle-) to form the wish.

I learned that katı means "solid" or "hard". Can it be used for people like this?

Yes! Physically, katı refers to a solid state of matter or something stiff. However, when used to describe a person, rules, or a system, it takes on the metaphorical meaning of "strict," "rigid," or "inflexible."