innehaben
to hold
To have or exercise an official position, office, or function. It is a formal expression.
Sie hat seit fünf Jahren den Lehrstuhl für moderne Geschichte inne.
She has held the chair of modern history for five years.

to hold
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to hold
To have or exercise an official position, office, or function. It is a formal expression.
Sie hat seit fünf Jahren den Lehrstuhl für moderne Geschichte inne.
She has held the chair of modern history for five years.

'Innehaben' (to hold) is a separable verb. The prefix 'inne' comes at the end in a main clause. In subordinate clauses and in the infinitive, the verb stays together.
Er hat dieses wichtige Amt schon seit zehn Jahren inne.
He has held this important office for ten years.
This verb belongs to formal or elevated language. You will find it mainly in official texts, news reports, or formal speeches.
Die Kanzlerin hat die Regierungsgewalt inne.
The chancellor holds governmental power.
'Innehaben' (to hold) is always used with a position or function as an accusative object. Typical objects are: 'ein Amt' (an office), 'eine Position' (a position), 'einen Posten' (a post), 'einen Lehrstuhl' (a chair), or 'die Macht' (power).
Wer wird nach der Wahl das Amt des Bürgermeisters innehaben?
Who will hold the office of mayor after the election?
to take over / take on
'übernehmen' and 'innehaben' can both have to do with a role, office, or responsibility. 'übernehmen' emphasizes the moment when someone accepts or receives a task, leadership role, or responsibility. After that, the person carries it out. 'innehaben' describes more of a state: someone holds an official office or function. It sounds more formal and is especially suitable in official texts. Learners may confuse the words because both occur with positions. In practice: you use 'ein Amt übernehmen' when you newly receive an office; you use 'ein Amt innehaben' when you hold or exercise it.

Frau Becker hat seit Montag das Amt der Vorsitzenden inne.
Ms. Becker has held the office of chairwoman since Monday.
Nach dem Urlaub übernimmt Erik die Leitung des Projekts.
After the vacation, Erik will take over the leadership of the project.