This is the 5616th most frequent Arabic word.
كانا
"كانا" in Arabic means "they (two males) were."
'كانا' is used for dual masculine subjects in the past tense and third person viewpoint.
كانا يعملان في الحديقة.
They were working in the garden.
'كانا' denotes a continuous action performed by two people in the past.
كانا ينتظران الحافلة.
They were waiting for the bus.
'كانا' here is linking the subject (dual) to the adjective describing their state in the past.