see 踏實|踏实[ta1 shi5]

to tread; to stamp; to step on; to press a pedal; to investigate on the spot

to set foot in; to tread (in or on); to walk into

firmly-based; steady; steadfast; to have peace of mind; free from anxiety; Taiwan pr. [ta4 shi2]

pedal (in a car, on a piano etc); treadle; footstool; footrest; footboard