This is the 325th most frequent Finnish word.
olemaan
"To be" (infinitive form, illative case).
In this example, 'olemaan' is used with 'valmistautuu', referring to preparation for adopting a state.
Hän valmistautuu olemaan hiljainen kokouksessa.
He/She is preparing to be silent at the meeting.
Here, 'olemaan' is the infinitive form used to express a continuous or abstract state—the action of being patient.
Haluan oppia olemaan kärsivällinen.
I want to learn to be patient.
In this sentence, 'olemaan' fits as the infinitive verb form, indicating the goal of the subject's efforts.