This is the 5822nd most frequent Japanese word.
ひしが
It seems there might be a typo. If you meant "ひし形 (ひしがた)," it means "diamond shape" or "rhombus."
Here, "ひしが" is literary or poetic expression indicating 'violently pressing' or 'forcefully striking'.
ひしが我を襲う波が見えた。
I observed waves attacking me forcibly.
"ひしが" here conveys 'intensely' or 'piercingly,' metaphorically used to describe the magnitude of emotional impact.
彼の言葉はひしが心に響いた。
His words intensely resonated in my heart.
In this sentence, "ひしが" describes a sharp and penetrating quality, often pertaining to sensations or emotions.