for one's mind to go blank, to freeze

中々: very, quite, considerably, rather, by no means (with negative verb)

very, quite, considerably, rather / by no means (with negative verb)

the daytime, during the day / a half day, half of a day

inside

頭: head

to go out

head / counter for large animals

head (body part) / (anatomy, archaic, possibly obsolete) the fontanelle part of the skull

a head, as when counting people, or cattle or other livestock