"I can absolutely understand" is a correct and usable phrase in written English. You can use it to express that you fully comprehend something. For example: "I can absolutely understand why you would want to take the day off."
I can absolutely understand your sense of frustration but, from what you say, I don't think your company is knowingly trying to cheat you.
My father had so much promise as a young man – he was witty, academically gifted and handsome, and I can absolutely understand why my mum had fallen for him when they met at university.
I can absolutely understand your frustration.
"Emotionally as a racer, on the track, I can absolutely understand why he would do it".
Leader of the Labour-run council, Nick Forbes, said: "I can absolutely understand people's anger.
"Emotionally as a racer, on the track, I can absolutely understand why he would do it," Wolff said.
"It's not to say that I'm not drawn to some of their concerns around gentrification-I can absolutely understand them," she said.
"You can absolutely understand it now in relation to what we're doing to our own environment – it's a simple matter of cause and effect.
A: I can absolutely see that.
For your information, I can absolutely read.
I can absolutely assure you of that".
Being a terminologist, I care about word choice. Ludwig simply helps me pick the best words for any translation. Five stars!
Maria Pia Montoro
Terminologist and Q/A Analyst @ Translation Centre for the Bodies of the European Union