divagate

verb divagate

• deviate — To deviate from something means to start doing something different or not planned, especially in a way that causes problems for others.
• digress — to deviate or wander away from the main topic or purpose in speaking or writing; depart from the principal line of argument, plot, study, etc.
• drift — a driving movement or force; impulse; impetus; pressure.
• wander — to ramble without a definite purpose or objective; roam, rove, or stray: to wander over the earth.
• ramble — to wander around in a leisurely, aimless manner: They rambled through the shops until closing time.