A person who sometimes exhibits humility and bashfulness is called shy.
As described in the Lalita-madhava, Krsna's shyness was manifested when He lifted Govardhan Hill by the little finger of His left hand. All of the gopis were observing Krsna's wonderful achievement, and Krsna was also smiling at seeing the gopis. When Krsna's glance went over the breasts of the gopis, His hand began to shake, and upon seeing His hand shake, all of the cowherd men underneath the hill became a little disturbed. Then there was a tumultuous roaring sound, and they all began to pray to Krsna for safety. At this time Lord Balarama was smiling, thinking that these cowherd men had been frightened by the shaking of Govardhan Hill. But, seeing Balarama smile, Krsna thought that Balarama had understood His mind in observing the breasts of the gopis, and He immediately became bashful.

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