godan verb (-su), transitive verb
Colloquial contraction of 察する, used for inferring or reading a situation intuitively. Often implies picking up on unspoken feelings or circumstances.
See also: 察する
彼の表情から、何かあったんだろうなってさっした。
From his expression, I guessed something must have happened.
Sensing the atmosphere, he fell silent.
godan verb (-su), transitive verb
sympathize with; understand (someone's feelings)
Used when one infers and empathizes with another's unspoken feelings or situation. Often appears in the phrase さっしてやる or さっしてくれる.
彼の気持ちをさっして、何も言わなかった。
Understanding his feelings, I didn't say anything.
もう少しさっしてくれよ。
Try to understand my situation a little more.