In the cytoskeleton

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I just looked it up and gathered that intermediate filaments reinforce the cell and organizes it into tissues.

The source is in the related links below.

Intermediate Filaments (IFs) are part of a cells cytoskeleton along with Microfilaments and Microtubules. Intermediate Filaments are intermediate in size compared to MFs and MTs. They are also more durable and stable than the others. They are mainly used in cellular adhesion and other specialized functions in cells.

cytoskeleten provide the skeletol function in the cell, and it composes from intermediat filament, actin filament and microtubule. It provides the structural backbone and movement of the cell