anxious; worried; apprehensive

misgivings; apprehensions; to worry about; to be concerned about

hesitation; misgivings; doubt

to worry; anxiety (about)

(idiom) carefree; without worries

mature reflection; after careful deliberations

to worry unnecessarily

to think over; to consider; anxiety

worrisome

to think sth through; to consider carefully

(feel) anxiety; concern

to worry about

to free the mind from worries

profound thoughts or ideas

careful thought

to plan and consider; to reflect on one's best strategy

long-term considerations; to take the long view

to give no cause for anxiety; nothing to worry about

to give sufficient consideration to

to plot actively (idiom); scheming; calculating

security concerns; safety considerations

(idiom) carefree; untroubled

see 杞人之憂|杞人之忧[Qi3 ren2 zhi1 you1]

to exhaust one's thoughts and ingenuity (idiom); to think sth through thoroughly; to rack one's brains; to leave no stone unturned

to exhaust one's thoughts and ingenuity (idiom); to think sth through thoroughly; to rack one's brains; to leave no stone unturned

lit. deep plans and distant thoughts; to plan far ahead (idiom)