Sentence:  whanne Percyual vnderstode that she was his veray syster / he was <WSD>inwardly</WSD> glad and sayd / faire syster I shalle entre therin / For yf I be a mys creature or an vntrue knyghte there shalle I perysshe<!--Prior quote:So whan Sir Percyvale undirstode she was hys verry syster, he was <WSD>inwardly</WSD> glad--> 
Meaning of the word marked with <WSD> tags:  Completely, fully.