Be afraid and Suppose

Suppose and be afraid are semantically related in regard topic. In some cases you can use "Suppose" instead a verb phrase "Be afraid", when it comes to topics like expect, believe, decide, anticipate.

Suppose verb - To decide the size, amount, number, or distance of (something) without actual measurement.

Be afraid and suppose are semantically related in believe topic. You can use "Be afraid" instead a verb "Suppose".