"Arch slightly" is commonly used to imply a subtle curve or bend, however, there are numerous synonyms that can be used to convey the same meaning. Some alternatives include "curve slightly," "bend slightly," "slight arching," "gentle bowing," and "softly rounded." Each of these phrases denotes a gentle incline or sloping that is slight and soft, without being too dramatic or severe. By using synonyms, writers and speakers can add depth and variety to their language choices, making their writing more engaging and effective. These various ways of expressing the same concept can add nuance and character to descriptions, narratives, and other forms of communication.