1) Be undecided about something 2) Go back and forth 3) Have trouble deciding 4) Hesitate 5) Hover 6) Keep changing 7) Oscillate 8) Vibrate 9) Waffle 10) Waver 1) Dillydally 2) Dither 3) Hem 4) Hesitate 5) Hover 6) Oscillate 7) Prevaricate 8) See-saw 9) Sit on the fence 10) Sway 11) Swing 12) Teeter 13) Waffle 14) Wag 15) Waver 16) Worry 17) Yo-yo 
fluctuate in opinion or resolution
• (v. t.) To move one way and the other; to reel or stagger; to waver. • (v. t.) To fluctuate in mind or opinion; to be unsteady or inconstant; to waver.
vacillate 1. To be indecisive or irresolute, changing between one opinion and another. 2. To be undecided about something; to waver between conflicting positions or courses of action. 3. To swing back and forth or to sway from side to side. 4. To move or to sway in a rising and falling or wavelike pattern. 5. Etymology: from Latin vacillationem...
[SAT terms] be undecided about something[PSAT glossary] be undecided about something[SAT terms] be undecided about something be undecided about something