fear, uneasiness, anxiety, concern, expectation, consideration
虞 centers on a worried, watchful state of mind: fearing something bad may happen, feeling uneasy, or carefully considering risks. The expectation sense is a natural extension of anticipating trouble.
虞 combines 虍 (tiger) with 吳, which likely contributes the sound. The tiger component may suggest a watchful, cautious attitude, fitting the meanings of fear and consideration.
A tiger's head 虍 looms over 吳, like a hidden threat you must watch for. This captures the feeling of unease and careful anticipation.
For グ, imagine a goose (グース) hissing in fear when it sees the tiger shape: goose -> グ, and the goose's anxiety mirrors the kanji's meaning.