1toe 
/ˈtoʊ/ noun
plural toes /ˈtoʊ/ noun [count] 1 : one of the five separate parts at the end of your foot
▪ He felt the sand/grass between his toes. ▪ I accidentally stepped on her toe. ▪ I stubbed my toe on the table's leg. — see picture at foot; compare finger; see also big toe 2 : the part of a shoe or sock that covers the front part of your foot
▪ My sock has a hole in the toe. ▪ boots with steel toes ▪ the toe of her boot — see picture at shoe 3 : something that is shaped like a toe
▪ the toe of the peninsula
▪ He felt the sand/grass between his toes. ▪ I accidentally stepped on her toe. ▪ I stubbed my toe on the table's leg. — see picture at foot; compare finger; see also big toe
▪ My sock has a hole in the toe. ▪ boots with steel toes ▪ the toe of her boot — see picture at shoe
▪ the toe of the peninsula
dip/put/stick a toe in the water
informal : to try an activity briefly to see if you like it
▪ I'm not sure I want to join, but I'd like to dip a toe in the water.
▪ I'm not sure I want to join, but I'd like to dip a toe in the water.
from top to toe — see 1top
keep (someone) on their toes
informal : to cause someone to be alert and prepared to deal with problems
▪ Taking care of three kids really keeps me on my toes. ▪ The boss made regular inspections in order to keep employees on their toes.
▪ Taking care of three kids really keeps me on my toes. ▪ The boss made regular inspections in order to keep employees on their toes.
make your toes curl
informal : to cause you to have a very strong and usually unpleasant feeling (such as a feeling of being embarrassed, annoyed, etc.)
▪ Just thinking about my old boyfriend makes my toes curl.
▪ Just thinking about my old boyfriend makes my toes curl.
point your toes — see 2point
step on someone's toes (US) or Brit tread on someone's toes
informal : to do something that upsets or offends someone
▪ You might step on the toes of some important people with this project. ▪ I don't want to step on anyone's toes.
▪ You might step on the toes of some important people with this project. ▪ I don't want to step on anyone's toes.
