Hän ei suostu odottamaan.

In Finnish, hän is a gender-neutral pronoun for a person. It can mean either he or she, depending on context.

So:

• Hän ei suostu odottamaan = He refuses to wait / She refuses to wait

Finnish usually does not mark gender in third-person singular pronouns the way English does.

Finnish makes negation with a special verb, often called the negative verb. It is conjugated for person, while the main verb appears in a special short form.

Here the subject is hän, so the negative verb is ei.

Compare:

• Minä en suostu = I do not agree / I refuse
• Sinä et suostu = you do not agree / you refuse
• Hän ei suostu = he/she does not agree / refuses

So ei is not just an extra word like English not. It is actually part of the Finnish verb system.

Because after the negative verb, the main verb takes the connegative form.

The normal 3rd person singular affirmative is:

• hän suostuu = he/she agrees

But in the negative:

• hän ei suostu = he/she does not agree / refuses

This happens very regularly in Finnish:

• hän tulee → hän ei tule
• hän sanoo → hän ei sano
• hän suostuu → hän ei suostu

So suostu is not a different dictionary form; it is the form used after negation.

Suostua means something like:

• to agree
• to consent
• to be willing

In a negative sentence, it often sounds most natural in English as to refuse.

So:

• Hän ei suostu odottamaan
  can be understood as
• He/she refuses to wait
• He/she won’t agree to wait

This is a bit stronger than simply saying:

• Hän ei halua odottaa = He/she does not want to wait

Ei suostu suggests resistance: the person is unwilling to go along with it.

After suostua, Finnish normally uses the -maan / -mään form of the next verb.

So you say:

• suostua odottamaan = to agree to wait
• suostua auttamaan = to agree to help
• suostua tulemaan = to agree to come

That is why the sentence has:

• odottamaan, not odottaa

For learners, the easiest way to remember it is:

• suostua + -maan/-mään form

So *Hän ei suostu odottaa is not standard Finnish.

Odottamaan is the third infinitive in the illative case, often just called the -maan/-mään form.

It is built from the verb stem plus -ma/-mä and an ending that gives -maan/-mään.

Here:

• odottaa → odottamaan

In this sentence, that form corresponds to English to wait after a verb like agree/refuse.

So even though it may look unusual, in this construction it simply means:

• odottamaan = to wait

Grammatically, it is present tense, but Finnish present tense often covers what English would express with either present or future.

So depending on context, Hän ei suostu odottamaan could mean:

• He/she is not willing to wait
• He/she refuses to wait
• He/she won’t agree to wait

Finnish often leaves the exact time reference to the situation or context.

No, this is the neutral basic word order:

• Hän = subject
• ei = negative verb
• suostu = main verb
• odottamaan = infinitive complement

So:

• Hän ei suostu odottamaan
  is a normal, unmarked way to say it.

You can change the word order for emphasis, for example:

• Ei hän suostu odottamaan.

That sounds more emphatic, something like:

• He/She just won’t agree to wait.

But the original sentence is the basic version learners should start with.

In written standard Finnish, hän is correct here.

In everyday spoken Finnish, many speakers often use se for people:

• Se ei suostu odottamaan.

So:

• Hän ei suostu odottamaan = standard/written style
• Se ei suostu odottamaan = very common in casual speech

Learners should definitely know hän, because it is the standard form, but it is also useful to recognize se in conversation.