This is the 896th most frequent Icelandic word.
bíða
"To wait."
The verb 'bíð' is used here in its present tense form to reflect the action of waiting for something specific, represented by 'rútunni' (the bus).
Ég bíð eftir rútunni.
I am waiting for the bus.
The past tense form 'biðum' is used to describe an action of waiting in the past, with the context of avoiding the rain.
Við biðum inni á meðan það rigndi.
We waited inside while it rained.
'Mun bíða' combines the future auxiliary verb 'mun' with the infinitive 'bíða' to express the intention to wait in the future.