だいたい details

roughly + write

daitai kaku

roughly; more or less — an approximation the speaker is not offering as exact

meaning: mostly write

説明せつめいを一度いちど聞きけば、だいたい分かるわかる。

setsumei o ichido kikeba, daitai wakaru.

Once I've heard the explanation, I mostly understand. neutral

宿題しゅくだい？だいたい終おわったよ。

shukudai? daitai owatta yo.

Homework? I'm pretty much done. casual

Examples

roughly; about — the figure or the extent is approximate, not exact

説明せつめいを一度いちど聞きけば、だいたい分わかる。

setsumei o ichido kikeba, daitai wakaru.

Once I've heard the explanation, I mostly understand. neutral

宿題しゅくだい？だいたい終おわったよ。

shukudai? daitai owatta yo.

Homework? I'm pretty much done. casual

駅えきから会場かいじょうまで、だいたい十分じゅっぷんかかります。

eki kara kaijou made, daitai juppun kakarimasu.

It takes about ten minutes from the station to the venue. neutral

準備じゅんびはだいたい整ととのっておりますが、細こまかい点てんは明日あした確認かくにんいたします。

junbi wa daitai totonotte orimasu ga, komakai ten wa ashita kakunin itashimasu.

Preparations are mostly in place; I will check the finer points tomorrow. formal

くらい
くらい is a suffix hanging off the quantity itself (三時さんじくらい) and goes wherever a noun goes; だいたい stands in front as an adverb, so it can also blur a whole predicate (だいたい分わかる), which くらい cannot do.