هي है hai, and Braj हे he
H هي है hai, (and Braj) हे he [old H. (2nd pers. sing.) ahasi, ahahi, or hai; Prk. prob. अहहि=S. अस्+असि (cf. hūṅ);—old H. (3rd pers. sing.) ahaʼi, or ahai; prob. Prk. अहइ=S. अस्+अति], (Thou) art;—(he, she, or it) is;—he (in Braj also)=ʻwere':—hai, adv. It is so; yes; indeed.
هي ही hī
H هي ही hī [prob. fr. S. एव; Prk. वेअ or विअ;—or perhaps akin to S. हि], emphat. adv. aff. Just, very, exactly, indeed, truly, only, alone, merely, solely, altogether, outright;—own; self;—(with inflected imperfect part.) immediately (on or upon), on the instant (of,—e.g. pahuṅćte-hī, 'immediately on arriving':—hī—as Hall has correctly pointed out—is often most adequately translated by simply emphasizing the word which it qualifies in Hindī, e.g. tumhārā-hī hai, 'it is yours').