Full of fear: really dreadful
Fear is a basic emotion in all living creatures, because it makes them recognize and avoid danger. It is therefore no wonder that so many words for it have been coined. Language can describe fear by registering the physical reaction to it, for instance, shaking and trembling (quite a few words for “fear” in the Indo-European languages belong here) or trying to flee from the source of danger, as in Greek phobós, known from the suffix -phobe and all kinds of phobias (phébomai “I fear; I flee from”; its Russian cognate beg- designates only “running”).